Get the jammer that's designed to minimize drag. The front-lined fabric is chlorine-resistant for long-lasting durability, and flatlock seams help reduce chafing. Name: Nike Swim Men's Poly Blend Solid Jammer Product Code: NESS8110-440 Category: Swimming Gender: Men's Color: Midnight Navy Material: Body: 82% Polyester 18% Spandex (Chlorine Resistant); Lining: 100% Recycled Polyester