Billabong 3x 2 Foil Chest Zip Materials ZG400 Superflex Neoprene Zero Gravilty Superflex Neoprene, common high performance Superflex neoprene, durable & flexible. Furnace Lining Furnace Lined back panel with moisture wicking, heat retaining jersey to maximise thermal retention. Sealed Seams All seams are Glued & Blind Stitched (Sealed) with strss point reinforcement on all internal seams & welded junction points. Entry Boa Chest Zip Entry NEW, re-engineered Chest Zip Entry for easy in-out, the disconnecting zip, disclocates like a Boa constrictor's jaw to maximise the size of the opening. Extras Contour Collar Contoured collar edge for unparalleled comfort & a water tight seal. Strategic Seam Placement Like all Billabong wetsuits, Billabong pay particular attention to the positioning & form of all seams & panels to maximise its comfort & performance without sacrificing fit. Wrist & Ankle Grippers 3D Silicon print grippers to eliminate movment & flushing, whilst being durable. Pre-Bent Anatomic Panelling Particular, Meticulous attention is paid to the fit & shaping of all Billabong Wetsuits.