The newly upgraded O’Neill Reactor II combines a perfect balance of stretch and durability to provide high-performance wear in cold water. The Reactor II wetsuit for men features a back-zipper for easy entry and exit all with a water-resistant closure. This men's wetsuit is made from super soft, premium neoprene, and all seams are sewn with a flatlock stitch for a superior feel and flexibility, especially in the paddle zones. A single super seal neck is adjustable to add comfort and reduce water exchange, while the Krypto knee pads give extra protection for this high wear area. The wind-resistant smooth skin chest and back panels keep you warmer when you’re sitting on your board or boat between sets. The O’Neill Reactor II lets you be the first in and the last out for more fun.