The Aqualung 3mm Mens Hydroflex Full Wetsuit uses high-stretch neoprene that stretches up to 250% more than standard neoprene for a second-skin feel and minimal drag. Crafted from non-petroleum-based, PAH-free, and limestone-derived neoprene using petroleum-free dyes, it's construction is eco-friendly. The flatlock stitching for a smooth feel against bare skin, reinforced knee pads, and a zipper loop for easy on-and-off access.