The 5/3mm Hurley Fusion is a nice, stretchy cold-water choice. The suit is made of 100% superstretch neoprene for maximum flexibility without added bulk. The sealed & taped seams work together with the waterproof chest zipper to keep cold water from trickling in while the poly fleece lining wicks moisture from the skin. The attached hood is also lined with poly fleece for some added warmth.