Frogg Toggs Men's Neoprene 3.5 Amphib Wader, Green, Medium - 2713143-MD The Frogg Toggs Amphib Neoprene Chest Wader features a 3.5mm neoprene upper with reinforced knees and high-density neoprene booties with sliding gravel guards. The high-back design allows for deeper wading. Neoprene suspenders with adjustable hook-and-loop attachment ensure a secure and comfortable fit. Handwarmer pockets provide storage and a safe place for cold hands.