The flatlock stitching involves laying one panel edge over the other, then stitching though the neoprene to make the material strong and flexible. A back zip provides an excellent water seal and allows maximum flexibility across the backpanel and shoulders. 2.5mm wetsuitSuitable for spring/summer surface watersportsFlatlock seamsBack zip fasteningKey pocketTaped seams: 54 X 57 X 2.5Size range: 150 X 140 X 0.5Fabric: 90% Neoprene / 10% NylonColour: Black/Blue