O'Neill's Fluid Neo Drysuit offers the perfect combination of flexibility and warmth with 3mm Fluidflex 2 neoprene throughout the suit. The Fluid Seam Welded construction, 100% horizontal back-dry zipper, and smoothskin neoprene neck seal and cuffs will ensure that no water enters the suit. Loose-fitting upper allows for easy layering underneath, while performance-fitting lower provides a snug fit to keep you warm and dry. Smoothskin neoprene neck seal Loose-fitting upper allows layering underneath | Men's Fluid Neoprene Dry Suit - Black - M