9.0 Long Description Eng:Outside Panels: 83% Nylon, 17% Spandex. Knee Panels and right back collar: 95% Nylon, 5% Spandex. Inside Chest and Back Panels: 64% Nylon, 36% Polyester. Other Inside Panels: 100% Nylon. All Panels bonded to neoprene (non-fibrous rubber)