Ingredient

Spandex (10%)

Neutral in 5 Flagged in 3

What is Spandex (10%)?

Spandex is a synthetic fiber known for its exceptional elasticity. It is made from a polymer called polyurethane, which is produced by reacting polyester with a diisocyanate. This process creates a material that can stretch up to 500% of its original length without breaking, making it a popular choice for form-fitting clothing.

The primary use of spandex is in fabrics that require elasticity, such as sportswear, activewear, and intimate apparel. There are no health concerns associated with the use of spandex in clothing as it is a stable, non-reactive material when used as intended. However, those with specific allergies to synthetic materials should be mindful.

When you see spandex on a label, it typically indicates the presence of stretch in the fabric. This can enhance comfort and fit, especially in clothes that are designed to hug the body closely.

Commonly found in: Sportswear, Leggings, Workout Shorts, Swimwear, Underwear

Benefits

Its elasticity enables better fit and comfort in clothing.
Spandex does not degrade quickly, adding durability to apparel.

FDA

The FDA does not regulate spandex in textiles; it is generally recognized as safe for use in clothing materials.

Research

There is little to no research indicating health risks from wearing spandex in everyday clothing.

Vegan

Spandex is a completely synthetic material and is considered vegan-friendly.

Sources: Understanding Stretch Materials: Spandex and its Applications

Scout's take

The 10% spandex is what delivers the contouring stretch and the recovery the built-in shelf bra needs to keep its support. In a GOTS-certified, PFAS-free construction with no polyester or nylon anywhere in the fabric, this share is a functional necessity rather than a source of exposure.

More from Scout's analyses

The 10% spandex is what delivers the compression fit a biker short needs. This sits at the top of the range that still reads as functional stretch, alongside a 90% organic cotton base free from BPA, PFAS, and formaldehyde.

from the analysis of MATE Organic Stretch Biker Short Bone

Synthetic polyurethane stretch fiber. Further adds to microplastic shedding and confirmed plastic leaching.

from the analysis of Wood Pocket Leggings

Synthetic polyurethane fiber. Sheds microplastics and confirmed plastic leaching during wear.

from the analysis of All In Motion Women's Cotton Balance Cotton Spandex Blend High-Rise Foldover Flare Leggings Heather Gray