Spandex
Spandex
A synthetic fiber known for exceptional elasticity, able to stretch up to 600% of its original length and snap back.
What Is Spandex?
Spandex is a synthetic fiber composed of a long-chain polyurethane-polyurea copolymer, invented by DuPont chemist Joseph Shivers in 1958. It is the same fiber known as elastane (the international generic name) and Lycra (DuPont's brand name). Spandex can stretch to 500-600% of its resting length and recover almost completely, a performance that no natural fiber can match. This revolutionary elasticity transformed lingerie design, enabling form-fitting garments that move naturally with the body.
Spandex is almost never used alone in lingerie. It is blended with other fibers at ratios typically between 2% and 20%. A small amount (2-5%) adds gentle give to woven fabrics like cotton or satin. A moderate amount (8-12%) creates the firm, supportive stretch needed in bra bands and shapewear. A high amount (15-20%) delivers the powerful compression found in waist cinchers and control briefs. The companion fiber determines the look and feel, while the spandex controls the stretch and recovery.
The way spandex is incorporated into a fabric affects performance. Bare spandex (uncovered filament) gives maximum stretch but can degrade quickly from body oils and friction. Covered spandex wraps the elastic filament inside a sheath of nylon or polyester, protecting it from degradation while maintaining stretch. Core-spun spandex wraps the elastic core with cotton or other natural fibers, combining stretch with the hand feel of the outer fiber. Most quality lingerie uses covered or core-spun spandex for durability.
Heat is spandex's primary enemy. Tumble drying, ironing, and even leaving lingerie in a hot car can permanently damage the elastic recovery. Chlorine (pools and bleach) chemically attacks the polymer chains. Body oils gradually weaken the fibers over time. To maximise the life of spandex lingerie: wash in cold water with mild detergent, never use bleach, air dry flat away from direct sunlight, and rotate between pieces rather than wearing the same bra or brief every day. With proper care, spandex maintains its stretch for 2-3 years of regular use.
How to Wear & Style
Spandex content directly affects how a garment fits and feels. For everyday bras, look for 10-15% spandex in the band for firm support that does not dig in. For lounge sets and sleep shorts, 5-8% gives comfortable stretch without feeling overly compressive. When gifting, higher spandex content makes sizing more forgiving because the garment adapts to a wider range of body shapes. If a bra band feels tight when new, the spandex will relax slightly after a few wears and mould to the body.
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Browse CollectionFrequently Asked Questions
What is spandex?
A synthetic fiber known for exceptional elasticity, able to stretch up to 600% of its original length and snap back.
Are spandex, elastane, and Lycra the same thing?
Yes, they are three names for the same polyurethane-polyurea copolymer fiber. Spandex is the common name used in North America and India. Elastane is the generic term used in Europe and on international care labels. Lycra is a trademarked brand name owned by The Lycra Company (formerly Invista/DuPont). When a label says 5% elastane, 5% spandex, or 5% Lycra, it means the same fiber.
Why does spandex lingerie lose its stretch over time?
Spandex degrades from three main factors: heat, chlorine, and body oils. Machine drying and ironing break down the polyurethane chains. Chlorinated pool water and bleach chemically attack the fiber. Accumulated body oils and sweat slowly weaken the elastic recovery. To extend the life of spandex lingerie, always wash in cold water, air dry, avoid bleach, and rotate between multiple pieces rather than wearing the same one daily.