The Drylock is the top-of-the-line wetsuit top (top-of-the-tops?) with exclusive Drylock technologies, including a full QDF Quick Dry Fiber exterior, Drylock wrist seals, and 100% UltraStretch neoprene. Fast drying, hydrophobic outer lining promotes maximum warmth. Inner neoprene lining with performance and environmental benefits. A blend of bamboo charcoal fibers and recycled polyester fibers provides excellent heat retention and helps improve warmth. Comfortable, lightweight neoprene with softer foam and a tighter weave textile for less water absorption and better durability. Outer material with a smooth, uncoated finish that does not absorb water; provides excellent wind resistance when used in the body, and forms an excellent seal when used as a seal or hem. A fully sealed, maximum stretch seam construction that keeps water out. Neoprene panels are glued and pressed together, then blindstitched (needle doesn't fully penetrate neoprene, keeping water out). Can be finished with seam taping for added stretch, durability, and comfort. Exclusive "donut seal" construction keeps water out and forms a snug, comfortable seal. Centered elastic waist loop for keeping your top in place. Can help prevent the top riding up (and unexpected boardshort loss).