What Our Gearhead(R) Experts Are Saying: "Roxy's Swell Series 4/3 Back Zip Wetsuit is my go-to for chilly shoulder-season surf sessions. It's flexible, seals up tight, and the thermal lining really helps hold warmth when the wind picks up. The back zip makes it super easy to get in and out between sessions, which I appreciate when the water's cold." We reach for the Roxy Swell Series 4/3 Back Zip Wetsuit when dawn patrols demand a balance of warmth and freedom. Built with Roxy's Eco StretchFlight neoprene, it delivers impressive flexibility without sacrificing insulation, making paddling out and duck-diving effortless even in brisk conditions. The interior's Eco Sleek WarmFlight(R) thermal lining keeps core warmth steady, while GBS seams and Xtra-stretch taping lock out water for consistent comfort. Thoughtful details-like a GlideSkin neck seal and durable Supratex knee pads-boost long-term performance. And with recycled polyester and nylon linings, this wetsuit rides easy on both you and the planet.