O'Neill Wetsuits Womens 2/1 mm Bahia Short Sleeve Spring Wetsuit Should fit snug, but not too tight 2/1mm 100% Super Stretch Neoprene 40% UltraFlex 60% FluidFlex Seamless Paddle Zones Underarm, Back Zip Flatstitch Construction Chic styling and absolute function: a unique wetsuit line for the style-savvy and performance-driven athlete 2mm in Body 1mm in Sleeve