The newly upgraded Reactor II is engineered for performance in a value driven package A perfect combination of stretch and durability. Fresh colors and graphics with style that's built to last. Back entry zip system that provides easy entry and exit with a water tight seal. Ultra stretch, super soft, and premium neoprene for superior feel, flexibility, and high performance. Seamless paddle zones provide a flexible design which utilizes minimal seam & placement for comfort. Double seal neck with 100% ultra stretch, super gooey for superior feel and flexibility. Key Features and Materials Fluid Foam and Ultraflex Combination Flatloc-Stitched Breathable Seams Strategic Seamless Paddle Zones Wind-Resistant Smoothskin Boardshort Connector 2 mm thickness Size Height | Weight | Chest | Waist S 5'8" - 5'10" 135-155 pounds M 5'9" - 5'11" 155-170 pounds L 5'10" - 6' 170-190 pounds XL 5'11-6'1 190-210 pounds 2XL 6' - 6'2" and 210-230 pounds