High performance 4mm neoprene deck with Sealtex edge guard 3-ply waterproof, breathable fabric tunnel with adjustable neoprene chestband Breathable Fabric 3" tall neoprene transition to tunnel Removable suspenders Rim grip/safety slip technology 3/8" stitched bungee attachment to the rim Grabloop includes integrated safety whistle Double-stitched and sealed seams