PEDS Women's Unseen Loafer Liner with Anti-Slip Gel Tab and Odor Defense, 4 Pairs Liner: 92% Cotton, 8% Spandex Imported Machine Wash Odor Defense technology provides long-lasting freshness and reliable protection against odor-causing bacteria. Helps feet stay odor-free all day long Deep heel pocket and gel strip for best fit and to prevent slipping Flat seams for comfort Soft cotton fabric Satisfaction guarantee-if you are not completely satisfied with your PEDS product, simply return them to us for replacement