The bottom edge of a garment may appear simple, but it plays an important role in how clothing looks, moves, and performs.

This edge is known as the hem.

A hem finishes the raw edge of a garment and can help prevent fraying, improve durability, control shape, and create a specific visual silhouette. Its construction also influences how fabric hangs and moves.

Different garments require different hem constructions.

A lightweight linen shirt may use a narrow turned hem. A tailored jacket may use a more structured finishing method. A knit garment may use a ribbed hem, while a technical garment may use a bonded or laser-finished edge.

For summer clothing, hem design becomes particularly relevant because lightweight fabrics are sensitive to weight, stiffness, drape, airflow, movement, and seam construction.

Understanding hem types provides another example of how seemingly small construction decisions contribute to the performance of an entire garment.

What Is a Hem?

A hem is the finished edge of a garment where the fabric is folded, sewn, bonded, or otherwise treated to prevent the raw edge from remaining exposed.

Hems are commonly found at:

• Shirt bottoms
• Jacket bottoms
• Trouser legs
• Skirt edges
• Dress hems
• Sleeve cuffs
• Shorts
• Coat bottoms
• Pocket edges

The basic purpose is to control the raw fabric edge.

Depending on the garment, a hem can also provide:

• Shape
• Weight
• Stability
• Durability
• Decorative detail
• Edge definition

The hem therefore functions as both a finishing system and a structural component.

Why Hem Construction Matters

A poorly selected hem can create problems even when the fabric and pattern are otherwise well designed.

Potential problems include:

• Excessive fraying
• Uneven garment length
• Fabric distortion
• Puckering
• Excess weight
• Poor drape
• Edge curling
• Seam failure
• Visible stitching
• Unwanted stiffness

The correct hem depends on the interaction between:

Fabric + Garment Type + Edge Shape + Weight + Construction + Intended Use

There is no universally superior hem.

The Basic Hem Construction

A conventional hem generally involves three stages:

1. Raw Edge

The fabric is cut to the desired garment length.

2. Fold

The edge is turned toward the inside of the garment.

3. Securing

The folded section is secured using:

• Stitching
• Blind stitching
• Adhesive
• Bonding
• Specialized machinery

The amount of fabric folded inward is called the hem allowance or hem depth.

Hem Allowance

Hem allowance is the amount of fabric reserved beyond the finished garment length so that the edge can be turned and secured.

The appropriate allowance depends on:

• Fabric thickness
• Fabric stability
• Garment type
• Hem shape
• Desired appearance
• Construction method

A thick fabric generally requires different treatment from a very lightweight fabric.

Similarly, a curved hem can require a different allowance from a straight hem.

1. Single-Fold Hem

A single-fold hem turns the raw edge inward once.

The fold is then secured with stitching.

It is relatively simple and can work well when the raw edge is already stable or has been separately finished.

Common applications include:

• Casual shirts
• Lightweight garments
• Certain skirts
• Simple woven garments

The main advantage is reduced fabric bulk.

2. Double-Fold Hem

A double-fold hem turns the raw edge inward twice.

The first fold encloses the raw edge, and the second fold creates the finished hem.

This provides a clean interior finish because the raw edge is enclosed.

Double-fold hems are common in:

• Shirts
• Dresses
• Skirts
• Shorts
• Lightweight jackets

They are particularly useful when a clean appearance is required on both sides of the garment.

3. Narrow Hem

A narrow hem uses a relatively small amount of fabric at the edge.

It is often used with lightweight fabrics because a large folded hem could create unnecessary weight or stiffness.

Typical applications include:

• Lightweight shirts
• Scarves
• Fine dresses
• Sheer fabrics
• Lightweight summer garments

The smaller fold helps preserve the fabric's natural drape.

4. Wide Hem

A wide hem uses a larger amount of folded fabric.

It can provide:

• Greater stability
• Additional weight
• Stronger edge definition
• Better control of shape

Wide hems are commonly used in garments where the bottom edge needs more structure.

However, excessive hem depth can alter the drape of lightweight materials.

5. Blind Hem

A blind hem is designed so that the stitching is minimally visible from the outside.

The thread catches only a small amount of the outer fabric while securing the folded hem internally.

Blind hems are common in:

• Trousers
• Skirts
• Formal garments
• Tailored clothing
• Dresses

They provide a cleaner external appearance than a conventional visible topstitch.

6. Topstitched Hem

A topstitched hem is secured with visible stitching along the outer surface.

The stitching can be:

• Single
• Double
• Contrast
• Tonal
• Decorative

Topstitched hems are common in:

• Denim
• Casual shirts
• Workwear
• Jackets
• Overshirts

The visible stitch becomes part of the garment's design language.

7. Coverstitched Hem

A coverstitch is commonly used on knitted garments.

It creates a flexible seam with visible parallel lines on one side and a looped structure on the other.

Coverstitched hems are common in:

• T-shirts
• Activewear
• Jersey garments
• Stretch clothing

The construction can accommodate repeated stretching without behaving like a rigid woven hem.

8. Overlock-Finished Hem

An overlock machine uses multiple threads to secure and finish the fabric edge.

It can help prevent fraying while creating an efficient seam finish.

Overlock construction is particularly common in:

• Knitwear
• Mass-produced garments
• Casual clothing
• Stretch garments

An overlock finish can sometimes be combined with additional folding and stitching to create the final hem.

9. Rolled Hem

A rolled hem turns the edge into a very narrow roll of fabric.

It is particularly useful for lightweight and delicate materials.

Common applications include:

• Silk
• Chiffon
• Lightweight polyester
• Fine cotton
• Scarves
• Lightweight dresses

The narrow construction minimizes bulk.

For very lightweight summer fabrics, this can help preserve drape and reduce edge weight.

10. Raw Hem

A raw hem leaves the fabric edge intentionally unfinished.

It is a design choice rather than a conventional finishing method.

Raw hems are commonly used in:

• Denim
• Distressed garments
• Casual fashion
• Deconstructed designs

The edge may naturally fray over time.

This can be intentional, but the designer must understand how the particular fabric behaves after cutting.

11. Frayed Hem

A frayed hem intentionally allows controlled fibers to extend beyond the garment edge.

The result can create a distressed or informal appearance.

This technique is common in:

• Denim
• Cotton garments
• Casualwear
• Fashion-oriented garments

Fraying must be controlled because excessive unraveling can alter garment length and appearance.

12. Bound Hem

A bound hem uses another strip of fabric or binding material to cover the raw edge.

The binding can be:

• Same fabric
• Contrast fabric
• Bias binding
• Technical tape

Bound finishes can provide a clean edge while also reinforcing the fabric.

They are useful when the garment material is difficult to fold cleanly.

13. Bias-Bound Hem

A bias binding is cut diagonally relative to the fabric's grain.

Because of this orientation, it can conform more easily to curves.

Bias-bound hems are useful for:

• Curved edges
• Lightweight garments
• Dresses
• Armholes
• Necklines
• Decorative finishing

The flexibility of bias-cut fabric makes it particularly useful around non-linear edges.

14. Faced Hem

A faced hem uses a separate piece of fabric, called a facing, to finish the edge.

The facing is attached and then turned inward.

This method can create a clean finish without requiring the main garment fabric to be folded extensively.

It can be useful for:

• Curved hems
• Tailored garments
• Formal clothing
• Heavy or structured fabrics

The facing can also provide additional control over the edge.

15. Turn-Up Hem

A turn-up hem folds the bottom portion of the garment outward or inward to create a visible cuff-like effect.

It is common in:

• Trousers
• Shorts
• Casual garments

A turn-up adds additional material and visual weight to the bottom of the garment.

This can intentionally change the garment's proportions.

16. Cuffed Hem

A cuffed hem creates a distinct folded section at the bottom of the garment.

It can be:

• Fixed
• Folded
• Sewn
• Adjustable

Cuffed hems are common in:

• Trousers
• Shorts
• Sleeves
• Casual jackets

Because the cuff adds material, it can influence the balance and drape of lightweight garments.

17. Ribbed Hem

A ribbed hem is commonly found in knitted garments.

Rib fabric has alternating knit structures that provide elasticity.

Ribbed hems are widely used in:

• Sweatshirts
• Jackets
• Knit tops
• Sportswear
• Casualwear

The rib section can provide:

• Stretch
• Recovery
• Edge stability
• Body-hugging control

This is particularly useful when the garment needs to return toward its original shape after movement.

18. Elasticated Hem

An elasticated hem incorporates elastic into the garment edge.

It can create a closer fit around the body.

Common applications include:

• Sportswear
• Windbreakers
• Lightweight jackets
• Casual outerwear

Elastic can help control the garment's position during movement.

However, a tighter hem also changes how air enters and exits the garment.

19. Drawcord Hem

A drawcord hem uses a cord or drawstring that can be tightened or loosened.

It is common in:

• Outdoor clothing
• Technical jackets
• Oversized garments
• Parkas
• Casualwear

The wearer can adjust the garment opening.

This provides versatility but introduces additional hardware and construction components.

20. Curved Hem

A curved hem changes the garment's bottom edge from a straight line to a controlled curve.

Examples include:

• Shirt tails
• Rounded overshirts
• High-low hems
• Draped garments

Curved hems require careful pattern making because the fabric must distribute correctly around the edge.

If the hem allowance is not appropriate, the finished edge can develop:

• Puckering
• Rippling
• Uneven width
• Excess fabric

21. High-Low Hem

A high-low hem has different lengths at different points of the garment.

For example:

• Shorter front
• Longer back

This construction can alter the visual proportions of the garment while also affecting movement.

It is common in:

• Shirts
• Dresses
• Tunics
• Contemporary fashion

The pattern must account for the transition between different hem lengths.

22. Scalloped Hem

A scalloped hem consists of repeated curved sections along the garment edge.

It is primarily decorative but requires careful edge construction.

Scalloped hems may be found in:

• Dresses
• Skirts
• Blouses
• Decorative garments

The curves must be properly stabilized and finished to prevent distortion.

Hem Types and Fabric Behavior

Different fabrics respond differently to hems.

Linen

Linen can fray relatively easily and often benefits from a clean enclosed or appropriately finished edge.

Cotton

Cotton can accommodate many conventional hem constructions.

Polyester

Synthetic fabrics may require different temperature and finishing considerations during pressing.

Mesh

Mesh and open structures require careful handling because conventional folding may not behave as expected.

Knits

Knitted fabrics require constructions that accommodate stretch and recovery.

Sheer Fabrics

Very lightweight sheer fabrics often benefit from narrow or rolled hems to minimize visible bulk.

This demonstrates a key principle:

Hem design must respond to fabric behavior.

Hem Construction and Garment Weight

Every folded hem adds some material to the edge.

On heavy garments, this additional weight may be relatively insignificant.

On extremely lightweight garments, however, a large hem can create a noticeable difference in drape.

A heavy hem can cause the fabric to:

• Hang differently
• Swing differently
• Fold differently
• Lose some of its natural fluidity

For lightweight summer clothing, controlling edge weight can therefore be important.

Hem Construction and Drape

Drape describes how fabric falls and forms around the body under gravity.

The hem is the lowest structural edge of many garments and can influence how that fabric behaves.

A:

Narrow Hem → Lower Edge Weight

Wide Hem → Greater Edge Weight

Structured Hem → Greater Edge Control

Soft Hem → More Natural Drape

The best choice depends on the intended silhouette.

Hem Construction and Movement

The hem moves whenever the wearer moves.

Walking, sitting, running, reaching, and wind exposure can all change the shape of the bottom edge.

A hem can therefore influence:

• Garment swing
• Movement freedom
• Visual rhythm
• Air exchange
• Garment stability

A lightweight garment with a flexible hem may move considerably in airflow.

This movement can contribute to the dynamic behavior of the garment.

Hem Construction and Airflow

The bottom hem is one of the major openings through which air can enter and exit a garment.

This is particularly relevant to loose summer clothing.

When the body moves, pressure changes and fabric movement can encourage air exchange through openings around:

• Hem
• Sleeves
• Neckline
• Side openings

However, a hem alone does not determine ventilation.

Airflow depends on the complete system:

Hem Opening + Garment Volume + Fabric Permeability + Other Openings + Body Movement + Environmental Airflow

A loose hem can provide an additional pathway for air movement, but it does not compensate for a low-permeability fabric or excessively restrictive construction.

Hem Types for Summer Clothing

Different summer garments can use different hem strategies.

Hem Design for Jackets

Jacket hems have additional structural requirements.

A jacket hem may need to accommodate:

• Lining
• Interfacing
• Zippers
• Drawcords
• Elastic
• Snap fasteners
• Pocket bags
• Multiple fabric layers

A lightweight summer jacket may therefore require a different hem architecture from a winter coat.

The construction should maintain the intended silhouette without creating unnecessary bulk.

Hem Design for Oversized Garments

Oversized garments often have substantial body volume.

The hem becomes important because it visually defines the lower boundary of that volume.

A straight hem can create a more geometric appearance.

A curved hem can soften the silhouette.

A drawcord hem can allow the wearer to adjust the shape.

A raw hem can create a more informal aesthetic.

The hem is therefore part of the overall proportion of an oversized garment rather than merely a finishing detail.

Hem Design and Layering

Layering introduces another consideration.

If a jacket is worn over a shirt, the relationship between the two hems affects:

• Visual proportion
• Garment movement
• Fabric overlap
• Air space

A long outer-layer hem can provide greater coverage.

A shorter hem can create more visual separation between layers.

The best length depends on garment purpose, body proportions, and intended styling.

Common Hem Problems

1. Hem Puckering

The fabric gathers or wrinkles along the stitched edge.

Possible causes include:

• Excessive thread tension
• Incorrect stitch length
• Fabric instability
• Poor pressing

2. Uneven Hem

The finished edge varies in length.

Possible causes include:

• Pattern inaccuracies
• Fabric distortion
• Incorrect cutting
• Uneven folding

3. Hem Flare

The hem may extend outward unexpectedly.

This can occur with curved patterns or insufficient control of the hem allowance.

4. Hem Curling

Common in some knitted fabrics.

The edge may roll because of fabric structure and tension.

5. Excessive Bulk

A hem can become too thick when:

• Multiple layers overlap
• Fabric is heavy
• The fold is too large
• Additional reinforcement is used

6. Fraying

An inadequately finished woven edge can unravel over time.

The appropriate finishing method depends on the fiber, weave, and garment use.

How Hem Construction Is Tested

A hem should be evaluated both visually and mechanically.

Visual Inspection

Check:

• Straightness
• Symmetry
• Stitch consistency
• Edge shape
• Fabric distortion

Movement Testing

Observe the hem while the wearer:

• Walks
• Sits
• Bends
• Raises the arms
• Turns
• Moves outdoors

Wash Testing

Repeated washing can reveal:

• Shrinkage
• Twisting
• Fraying
• Stitch failure
• Hem distortion

Fabric Testing

Different textiles should be tested individually because the same hem construction can behave differently across fabrics.

How to Choose the Right Hem

A practical selection process begins with the fabric and garment purpose.

Lightweight Fabric

Consider:

• Narrow hem
• Rolled hem
• Fine double-fold hem
• Lightweight binding

Heavy Fabric

Consider:

• Wide hem
• Faced construction
• Structured finishing

Stretch Fabric

Consider:

• Coverstitch
• Overlock-based construction
• Ribbed hem
• Elasticated finish

Curved Edge

Consider:

• Bias binding
• Facing
• Narrow hem

Technical Jacket

Consider:

• Elastic
• Drawcord
• Bound edge
• Specialized bonded construction

The final decision should account for:

Fabric + Garment Shape + Weight + Movement + Durability + Aesthetic

Hem Construction as Garment Engineering

A useful way to understand hem design is to place it within the complete garment system:

Fiber → Yarn → Fabric → Pattern → Fit → Seam → Hem → Garment Movement

Each stage influences the next.

The fabric determines how easily the edge can be folded.

The pattern determines the hem shape.

The construction method determines edge stability.

The hem weight influences drape.

The finished edge affects movement and appearance.

This is why hem construction should not be treated as an afterthought.

The Engineering Principle Behind Hems

The purpose of a hem is not simply to hide the raw edge.

It is to create a controlled transition between the fabric and the environment.

A successful hem balances:

Edge Stability + Weight + Flexibility + Durability + Drape + Appearance

Too much structure can make a lightweight garment stiff.

Too little finishing can lead to fraying or instability.

Too much hem allowance can add unnecessary weight.

Too little allowance can make construction difficult.

The correct hem is therefore the one that matches the fabric, garment geometry, intended movement, and final use.

Conclusion

Hems are among the simplest-looking components of clothing, yet they have a measurable effect on garment behavior.

From narrow and rolled hems to blind, bound, ribbed, elasticated, faced, and drawcord constructions, each method solves a different design or engineering problem.

For summer clothing, the hem can influence:

Weight + Drape + Movement + Durability + Edge Stability + Airflow

This becomes particularly important with lightweight fabrics, where small changes in construction can significantly affect how the garment hangs and moves.

The best hem is therefore not simply the neatest one.

It is the hem that is appropriate for the fabric, silhouette, climate, movement requirements, and construction system.

At Airlayer, this systems-based approach forms part of how we think about summer clothing. From fabric selection and pattern making to armholes, shoulders, collars, seams, and hems, every component contributes to how a garment interacts with the body, heat, movement, and airflow.

Airlayer — Summer Clothing, Engineered for Air.