The 1.5MM Flatlock Wetsuit Jacket is an elevated take on the everyday wetsuit jacket. Made with premium Yamamoto foam rubber, this jacket is ultra-stretchy & durable. A flatlock stitch design sits flush against your skin to ward off chafing during long days in tropical water. Fit Guide We recommend sizing down for a better fit (e.g. if you're typically a medium, get a small).Benefits One of John John's essentials at home on the North Shore. Yamamoto foam rubber is ultra-stretchy, durable and premium. Performance patterning delivers a better, more secure fit. Lower collared design is more comfortable and doesn't flush. Boardshort tie locks down the jacket in heavy water. Burgee heat transfer on left arm. Flatlock stitching sits flush with the skin to prevent chafing during long sessions. Details 100% Yamamoto foam rubber FIT GUIDE Use the chart below to determine your size. If you’re on the borderline between two sizes, please order the smaller size for a snug, watertight fit. All body types are different – this scale provides an approximate weight and height range to find your appropriate size. MEN'S SIZE CHART Size Height (feet) Weight (pounds) XS 5'5" - 5'8" 125-140 S 5'6" - 5'8" 135-150 ST 5'8" - 5'10" 145-160 MS 5'6" - 5'9" 145-160 M 5'8" - 5'11" 150-170 MT 5'11" - 6'1" 165-180 LS 5'7" - 5'9" 170-175 L 5'10" - 6'0" 175-190 LT 6'1" - 6'3" 185-200 XLS 5'7" - 5'9" 185-190 XL 5'10" - 6'2" 190-215 XXL 6'2" - 6'4" 215-230