NWT - Purchased the wrong size. First Line underwear is made with OEKO-TEX® 100 Certified fabrics which is one of the world's best-known labels for textiles tested for harmful substances. Fit-tested on all body types 95% OEKO-TEX Certified cotton, 5% spandex Lining: 89% Polyester, 11% Spandex Absorbs up to 8 tsps of liquid Low rise Signature stay-put silky soft waistband Smooth, durable flatlock seams won’t irritate or chafe Machine wash cold, tumble dry low.