Women's Picture Equation 4/3 FZ Wetsuit features a range of the most-advanced insulating technologies to keep you warm. Equation wetsuits are made with Eicoprene, a non-petroleum-based synthetic foam derived from a mix of limestone and recycled tires (30%). The recycled polyester lining is laminated using Aqua-A™, a solvent-free water-based glue with no harmful chemicals. This 4/3 Front Zip wetsuit is designed for 52°F-63°F water. The 3D-Knit construction and the WPF lining (Warmth Performance), the warmest lining available from Picture, provides warmth by trapping air between each loop. The dense fabric offers extra comfort while the front zip and watertight seals minimize water entry to keep you as dry as possible. This wetsuit also features comfort zones designed to protect your ribs when paddling. It also features glued, blind-stitched, fully taped seams (GBS) to provide protection, stretch, and water resistance.