Xcel Drylock 5/4mm Mens Chest Zip Wetsuit 2018 For those after a seriously warm winter wetsuit look no further than the Xcel Drylock 5/4mm chest zip suit. It is bursting with features to keep you as warm as possible even in the harshest of winter months. DRYLOCK FEATURES Japanese Limestone Nanoprene = Lighter, Softer, Warmer All New Celliant Black = Warmer & Lighter Watertight Zipper with Magnetic Closure = Locks Water Out Supple Quick Dry Fibers = Stay Dryer & Lighter Engineered Fit System = Fits like a Second Skin Drylock Wrist Seals = Locks Water Out New Fusion-X Seam Tape = High-Pressure Seam Protection Nexskin Ankle Seals = Anti Flushing Glideskin Collar = Prevents Flushing Back Knee Flex Groves = Prevents Bunching New Sleeve Design = Increased Range Of Motion 100% Ultra Stretch = True Performance Dope Dye = Eco-Friendly Anti Fade