Super Insulated Constant Volume Vest - Triple Layer Introducing a new unique thermo Mesh Vest based on the Patented D1 ISS Hybrid, Waterproof takes one more step to enhance the rock solid ground as being the overall leader in the Drysuit diving community. The extraordinary performance Formula WP 3D Mesh Vest features a triple layer insulation in front of the torso and spinepad. Including an extra-long back panel covering kidneys and the panels normally squeezed by the weight belt. The Formula WP 3D Mesh Vest has 2x 3mm Double layer stretch 3D mesh and an extra support of 5mm, 70 Denier 3D Mesh from the D1 Hybrid. This gives an 11mm constant volume insulation “air bubble” around the front and back of the entire torso. Cool ventilation on the surface and super insulation when submerged. Zipped up front with a YKK #5 zipper. • Dual Layers of 3D Mesh - The side and shoulder panels have double layers are made of soft and stretchy 2x3mm 3D Mesh. Comfortable and adjusts to different body shapes. • YKK Zipper - High quality YKK Vislon zipper no 5. • Long Tail • 8x Mens: XS, S, M, ML, L, XL, XXL, 3XL/t+. • 7x Ladies: XS, S, M, ML, L, XL, XXL. Follow the link for Size Charts Product Sheet for 3D Mesh Vest (PDF)