The Quiksilver Mens Prologue 3/2mm Back Zip Steamer Wetsuit is made with Freemax neoprene on body and legs with Hyperstretch 3.0 on arms, along with resistant flatlock seams and YKK #10 plastic zip. Quiksilver Mens Prologue 3/2mm Back Zip Steamer Wetsuit Features: 83% Nylon, 17% Elastane Freemax neoprene on body & legs with Hyperstretch 3.0 on arms Flatlock stitched seams; soft, flexible and durable Back zip entry with YKK #10 plastic zip Hydrowrap adjustable neck closure system for a watertight seal Drainage holes