As part of the Synergy Series, the Billabong 4/3 Synergy Back Zip Wetsuit offers some of the best new wetsuit technology at a value that simply cannot be beat. Eco-conscious and stretchy, the Superlight neoprene along with GBS seams give wearers unmatched flexibility and thermal retention while the hassle-free back zip entry allows for easier transitions as you shimmy in/out in the parking lot. If you're looking for a great mid-cold water wetsuit at a bargain, look no further than the Billabong 4/3 Synergy Back Zip Wetsuit.