Ingredient

Elastane (5%)

Neutral in 8 Flagged in 3

What is Elastane (5%)?

Elastane, commonly known as Spandex or Lycra, is a synthetic fiber known for its exceptional elasticity. It is produced through a complex chemical process involving the reaction of polyester with diisocyanate, resulting in a highly flexible and durable material.

In consumer products, elastane is used to provide stretchability and comfort, particularly in clothing and textile applications like workout gear and intimate apparel. While generally considered safe for wear, some individuals may experience skin irritation or allergic reactions.

When you see elastane on a label, it typically indicates that the product can stretch and provide a snug fit, enhancing comfort and performance. It's important to be aware if you have sensitive skin or known allergies.

Commonly found in: Workout Tops, Sports Bras, Feminine Care Products, Bras, Activewear

What to watch

May cause skin irritation or allergic reactions in sensitive individuals.
Manufacturing process involves synthetic chemicals.

Benefits

Provides significant stretch and flexibility to fabrics.
Enhances comfort and fit in apparel.

FDA

Elastane is not a food ingredient and thus not regulated by the FDA for consumption.

Research

Some studies highlight concerns over chemical exposure in production, while others focus on its widespread utility and safety in textile use.

Vegan

Elastane is a synthetic, non-animal-derived material and is generally accepted in vegan products.

Sources: Spandex: Characteristics and Uses

Scout's take

Synthetic polyurethane fiber for stretch, held to the 5% minimum a legging needs to hold its shape. Alongside 95% organic cotton, this small share is a functional necessity rather than a meaningful source of exposure.

More from Scout's analyses

Held to the 5% minimum the band needs to hold its shape and keep support through the day. At this share, in a GOTS-certified construction, it is a functional necessity rather than a source of exposure.

from the analysis of Pact Everyday Strappy Scoop Bralette Light Heather Grey

The 5% elastane is the minimum needed for the band to hold its shape. Alongside 95% organic cotton, this share is a functional necessity rather than a meaningful source of exposure.

from the analysis of Organic Cotton Bralette Dark Olive

Processed additive flagged under Scout's ingredient doctrine.

from the analysis of Subset Men's Boxer Brief