This classic brief made of rib-knit fabric offers more stretch than our normal jersey cloth. We chose a slightly larger leg opening for increased comfort. It also features a new type of elastic on both waist and leg openings: for the waist, a 7/8" wide laid-on elastic has a flat stitch to minimize thickness; for the legs, the elastic is folded over with ¼” finished edges. All our elastic is 100% latex-free and formaldehyde-free, being made of the finest nylon/spandex available in the States. These improved elastics were designed specifically for women's intimate apparel and are more durable than most. Panties are made of 100% organic cotton. Machine washable. Made in the U.S.A. *Our "Made in the USA" underwear received an A+ rating in Green America’s "Guide to Ending Sweatshops," Spring 2008.