"I'm a larger lady and know a few things about materials for costuming but recently I heard someone talking about Spandex.  I was wondering if there was some information out there about spandex, and if there is a difference in lycra and spandex".

The Answer comes from Halima, of Designs by Halima in Washington

Known for its extraordinary elasticity, spandex has been used extensively for foundation garments and all types of active sportswear (including swimwear and dancewear) since it’s introduction in 1958.  Spandex is frequently called by one of its trade names – Lycra ® Dupont. Lycra is Dupont’s brand name for Spandex.  Spandex is a durable fiber, which has more restraining power than elastic and is more flexible.

Spandex fabric can be stretched repeatedly and still snap back to its original shape and length. It can be stretched from four to seven times its length without breaking. When compared to rubber, it is stronger, more durable with greater tear resistance. It is more resistant to abrasion, flexing, sunlight, weather, heat, detergent, body oil, and perspiration. It is lighter weight and can be made into finer yarns. It can be stitched through without damaging the fiber and reducing the recovery.

Zaina Hart
Costume made out of pink/black spandex
with beaded overlay

Spandex can be added to any fabric, knit or woven, and to a variety of fibers to add stretch in the length, width, or both directions.

Today, it is used in small amounts to add stretch and freedom of movement, improve the look, feel, fit, and comfort; maintain the shape; and eliminate bagging. It is used in large amounts for high stretch designs such as foundation garments, women's swimwear, skiwear, swimsuits, dance apparel and skating costumes.

For costuming use I have used it in body stockings, inserts in skirts and dresses, shorts to use under costumes, gauntlets, etc.  You will often see full costumes made with spandex and beadwork, rhinestones, etc. overlaid.  Spandex comes in many colors so the creative horizon is limited only to your imagination.