Speedo Kinetic Zag Recordbreaker 51% Polyester, 49% Polyester Importado All the long lasting performance qualities of our endurance+ fabric in a 10 percentage lighter weight perfect for lap swimming and training Resists bagging, sagging, and the effects of suntan lotion, skin oils, and chlorine Unique flat lock stitching for superior fit and feel Full front and back lined with thick strap record breaker back styling for a comfortable, secure fit that doesn't bind, gap, or restrict movement Made by speedo, the world's 1 swim brand