The Billabong 2mm Synergy Back Zip Short Sleeve Springsuit is the classic springsuit. It's got short sleeves, above-the knee legs, a back zip and a medium-thin 2mm weight. This suit is good to go for all of your summer water activities. It's just enough to keep you protected from the cold and the minor irritants of the water, and still short enough for free movement and a more connected, immersed feeling in the big blue.