Speedo Men's Solid Powerflex Jammer 78% Nylon, 22% Spandex Imported Constructed from LYCRA XTRA LIFE fiber which helps retain shape up to 10X longer than traditional swimwear fabrics Form-fitting swim bottom featuring lined front and drawstring waist More resistant to fiber breakage in chlorine Helps resist sagging and bagging, keeping swimwear fitting newer longer Provides resistance to suntan lotions, skin oils and chlorine better than conventional fabrics