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Best Fabric For Underwear? (Complete Guide)

Best Fabric For Underwear

Underwear is an essential part of everyone’s wardrobe. Choosing the right fabric for your underwear is important for comfort, breathability, and durability. The fabric directly touches your skin, so it needs to feel soft and smooth against your body. This complete guide will examine the best fabrics for underwear based on factors like stretch, breathability, moisture-wicking abilities, and care requirements.

Different Types of Fabrics Used For Underwear

There are many fabric options when it comes to underwear. The most common types include:


Cotton is a natural fiber that is breathable, soft, and comfortable against the skin. It is one of the most popular choices for underwear. The advantages of cotton underwear include:

  • Breathable and moisture-wicking
  • Provides comfort for all-day wear
  • Easy to wash and durable with proper care
  • Available in different weights and weaves

The disadvantages of cotton include that it lacks stretch and shape retention. Pure cotton underwear can feel restrictive.


Modal is a semi-synthetic fiber made from beech tree pulp. It has a smooth, silk-like feel and is more breathable than cotton. The benefits of modal underwear include:

  • Extremely soft and smooth against the skin
  • Highly breathable and moisture-wicking
  • Maintains color well
  • Resists shrinking and pilling

The downside is that modal lacks elasticity and is prone to snagging.

Micro modal

Micro modal is a variation of the modal fabric made with extremely fine fibers. It is lightweight and even softer than regular modal. The advantages of micro modal underwear are:

  • Lightweight and ultra-soft
  • Great moisture-wicking ability
  • Breathable and smooth against skin
  • Reduced pilling and shrinkage

The fine fibers mean it lacks durability over time.


Microfiber fabrics are synthetics made with ultra-fine fibers. Common materials used include polyester, nylon, and other synthetic fibers. Benefits of microfiber underwear include:

  • Very smooth and soft
  • Moisture-wicking and quick-drying
  • Breathable and lightweight
  • Easy to wash and care for
  • Retains shape well

It lacks the natural feel of cotton and modal against the skin.

Bamboo Rayon

Bamboo rayon is a viscose fiber made from bamboo cellulose. It has excellent moisture-wicking abilities and a silky feel. The pros of bamboo rayon underwear are:

  • Extremely soft and breathable
  • Excellent moisture-wicking abilities
  • Naturally antibacterial properties
  • Biodegradable and eco-friendly material
  • Drapes nicely against the contours of the body

It lacks stretch and shape retention over time.


Nylon and spandex are synthetics often blended together in underwear for stretch capabilities. The blend is smooth and retains its shape well. Benefits include:

  • Provides stretch and shape retention
  • Quick-drying and lightweight
  • Easy to wash and care for

It can feel less breathable than natural fabrics.


Silk is a luxury natural fabric sometimes used in high-end underwear. It has an extremely soft, lightweight feel. The pros of silk underwear include:

  • Extremely lightweight and breathable
  • Naturally hypoallergenic
  • Smooth and soft against skin
  • Moisture-wicking and insulating
  • Luxurious feel and appearance
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The biggest downside is the high cost. Silk also requires delicate washing.

Factors to Consider When Choosing Underwear Fabrics

There are several factors to keep in mind when deciding on the best fabric for your underwear:

  • Comfort – Smooth and soft fabrics like cotton, micro modal, and silk will feel most comfortable against bare skin all day. Seams should lie flat and not be scratchy.
  • Breathability – Fabrics like cotton, modal, and silk allow for more airflow and moisture-wicking to keep you cool and dry.
  • Durability – Cotton holds up well to washing and wear over time. Synthetic blends with spandex retain shape better after many washes.
  • Stretch – Spandex and elastane help underwear move with you and retain shape. At least 5% spandex is ideal for a good fit.
  • Care – Most underwear today is machine washable. Delicates like silk require hand washing. Natural fibers like cotton are breathable.
  • Style – The style of underwear also determines ideal fabrics. Thongs should have stretch, while briefs need support.

Consider your needs for a comfortable daily wear underwear first, then factor in washing, durability, and style preferences. Blends often combine the best properties of natural and synthetic fabrics.

Comfort and Softness

For all-day comfort, natural fibers like cotton, modal, and silk feel best against bare skin. Aim for underwear in soft jersey knits rather than stiff poplin weaves for the most comfort. If you sleep in underwear, softness is also key. Modal and MicroModal offer an extremely soft and smooth feel.

Bamboo rayon and silk are also luxuriously soft choices. Softest does not always mean most breathable, however. You may overheat in ultra-soft synthetic fabrics. Lightweight cottons or cotton blends allow for airflow.

Seams also impact comfort levels. Flatlock seams lie smooth against the body while bonded seams eliminate chafing. Wide tagless waistbands are ideal for comfort as well.


Good breathability helps keep you cool, dry, and comfortable all over. Natural fabrics like cotton and silk have the best breathability. Cotton allows excellent airflow against the skin while wicking moisture away from the body. Silk is also extremely lightweight and breathable.

Semi-synthetics like modal and MicroModal offer improved breathability over synthetic fabrics. Mesh paneling on underwear helps improve ventilation as well. Stretch fabrics with spandex tend to be less breathable. Look for knit blend fabrics with cotton or modal if possible.

Durability and Care

The proper washing and care impact how well underwear holds up over time. Cotton stands the test of time. With proper wash care, it remains durable over years of wear and washing. Synthetics like polyester and nylon retain their stretch and shape wash after wash.

Silk and bamboo rayon require the most delicate care. They are prone to shrinking and water spots, so dry clean or hand wash is best. Cotton, modal, microfiber blends are fine in the washing machine. Use a mesh bag for delicates cycle to help protect elastic and avoid pilling. Tumble dry on low and avoid excessive heat.

Fit, Stretch, and Shape Retention

Underwear needs a little stretch and give to move with your body throughout the day. At least 5% spandex or elastane blended into the fabric provides the right stretch and recovery. Cotton blends with spandex offer both softness and stretch. Nylon and spandex retain shape exceptionally well over time.

For the best shapewear effect, look for at least 20% elastane. Thongs and G-strings require stretch through the waistband, rear, and crotch for coverage. Boyshorts and hipster styles need give through the hips and rear. Control top styles require firm spandex panels across the tummy and rear.

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Stretch lace tops also retain their shape better. Just beware lace can be scratchy and less breathable. Jersey knits without irritating lace edges can feel smoother against the skin.

Style and Usage

Fabrics for underwear vary by cut and style. Briefs need good coverage and often cotton for breathability. Active underwear with moisture-wicking abilities makes working out more comfortable. Lace accents work for feminine, romantic styles. Minimal thongs require flexible fabrics with stretch.

Lightwear fabrics like mesh, microfiber, silk, or rayon suit lightweight thongs or G-strings. Plus size underwear needs stretchy fabric blends and wide waistbands for comfort and support. Men’s boxers and briefs often use cotton blends for the right combination of breathability, support, and comfort.

Matching bra and panty sets look best in the same fabrics, especially lace, silk, or satin. Bamboo rayon makes soft, smooth pajama underwear sets. Overall, aim for soft, breathable fabrics that suit your style and allow confident all-day wear.

The 6 Best Fabrics for Underwear

The 6 Best Fabrics for Underwear

Based on factors like softness, breathability, stretch, and care requirements, these six fabrics stand out as excellent choices for underwear for both men and women:

1. Cotton

Cotton is the most popular underwear fabric for good reason – it’s comfortable, breathable, easy to wash, and long-lasting. Lightweight cotton jersey knits work well for underwear since they are soft while allowing airflow. Pima cotton and Supima cotton offer an ultra-soft feel. Modal cotton blends add softness. Cotton underwear holds up well over time with proper washing.

2. Micro Modal

For an unbelievably soft and smooth feel, Micro Modal is an excellent underwear fabric. It’s lightweight and even more breathable than cotton while feeling like silk against the skin. As a semi-synthetic fabric, it requires more delicate washing but provides exceptional comfort.

3. Bamboo Rayon

Bamboo rayon has moisture-wicking properties and a silky feel, making it a good underwear choice. It’s very soft, breathable, and drapes nicely on the body. It may be called viscose from bamboo. It’s also eco-friendly compared to synthetics. Just note it requires more delicate washing.

4. Nylon/Spandex Blends

Nylon blended with spandex offers stretch, shape retention, quick-drying properties, and easy washing care. This makes it a top functional choice, especially for active underwear. It may lack some of the softness of natural fabrics but provides a durable stretch that holds up over time.

5. Silk

Silk is the ultimate luxury fabric for underwear, providing an exceptionally soft and smooth feel. It’s breathable, lightweight moisture-wicking, and naturally hypoallergenic. The price tag of silk underwear is the biggest downside. Hand washing is also required to prevent water spots.

6. Cotton/Modal Blends

For the best comfort, breathability, and easy care, look for cotton underwear with added modal or MicroModal. This offers the softness of modal along with the easy washing and durability of cotton. Modal also helps add moisture-wicking and quick-drying properties.

Guide to Caring for Underwear Fabrics

Good washing and care habits maximize the comfort and extend the life of all types of underwear. Here are tips to keep fabrics feeling their best:

  • Read care labels – Most cotton, nylon, and microfiber blends are machine washable but silk, rayon, spandex, and lace need delicate handling.
  • Wash in lingerie bags – Use a mesh wash bag for all bras and delicate underwear to protect from snags, hooks, and rough fabrics.
  • Choose the delicates cycle – Washing underwear on the delicate or lingerie setting uses a gentle wash motion and lower spin speeds to protect fabrics.
  • Wash in cold water – Hot water can damage elastic, cause dye bleed, and shrink fabrics. Stick to cold washes.
  • Avoid fabric softener – Liquid softeners and dryer sheets coat fabrics, trapping odors over time. They can also affect moisture-wicking performance.
  • Line dry when possible – Air drying prevents heat damage from the dryer. Lay flat or use hangers to maintain shape.
  • Tumble dry on low – If machine drying, use the lowest heat setting. Remove right away to avoid over-drying stretchy fabrics.
  • Iron on low – On a polyester/cotton blend or silk setting, iron underwear inside out only when needed. Avoid direct heat on spandex.
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Following fabric care instructions, washing in cold water on delicate, and air drying when possible helps underwear last longer while keeping its shape and softness.

Frequently Asked Questions About Underwear Fabrics

Q: Is cotton or silk better for underwear?

A: Cotton is better for everyday underwear since it’s durable, breathable, and easy to wash. Silk feels luxuriously soft but requires hand washing or dry cleaning to prevent damage, so it’s not practical daily. Cotton provides good airflow and feels smoother against the skin than many synthetics.

Q: Should underwear have spandex?

A: Yes, spandex or elastane provides the ideal stretch and shape retention in underwear. At least 5% spandex blended into the fabric allows it to move with your body. Up to 20% spandex offers maximum stretch and recovery for shapewear or active underwear.

Q: What fabric is best for sweating?

A: For sweat-wicking performance, synthetic microfiber blends work best. Nylon and polyester microfibers whisk moisture away from the body and dry quickly. Look for mesh panels for maximized airflow and ventilation. Cotton also absorbs moisture but can feel damp when wet.

Q: Is modal or cotton more breathable?

A: Modal is more breathable than cotton due to its ultra fine fibers which allow for excellent airflow against the skin. It wicks moisture efficiently from the body. Cotton does offer good breathability as a natural fabric. For the ultimate in comfort, modal cotton blends maximize both softness and breathability.

Q: Can you put lace underwear in the washing machine?

A: Yes, you can wash delicate lace underwear in the machine but take steps to protect it. Use a lingerie bag on the gentle or delicates cycle in cold water. Never use hot water on lace fabrics as it can damage them. Lay flat or hang to dry – avoid high heat drying. With proper care, lace holds up well to machine washing.

Key Takeaways

For the ultimate comfort and performance, the best underwear fabrics are:

  • Soft natural fibers like cotton, modal, silk for comfort and breathability.
  • Lightweight microfibers and mesh for moisture-wicking and ventilation.
  • Nylon and spandex blends for stretch, shape retention and easy care.
  • Modal blends for combining softness and quick-drying abilities.
  • Delicate laces and silks for luxurious feel.

Consider your needs for comfort, activity, and style when choosing an underwear fabric. Follow care instructions to maximize durability while retaining softness and shape. With the right fabric choice, your underwear will feel great against your skin every day.

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