The Radar Tidal LTD Vest utilizes premium materials and thought-out cut lines to create a vest that bends and flexes with you, resulting in a better experience on the water.• Lightweight Zote foam• Small diamond fabric• 4-way stretch• CE impact approved• Not Coast Guard Approved• Men's chest sizes: S(31"-34"), M(34"-37"), L(37"-40"), XL(40"-43") 4-way stretch and smart segmentation enhance movement Small diamond fabric NOT USCG approved | Men's Tidal LTD Impact Watersports Vest