Size Chart XTERRA's most popular sleeveless wetsuit offering the perfect combination of price, performance, flexibility and durability. It is ideal for athletes who want an all-around wetsuit to use while training and racing. Features: - Sleeveless design allows for a more natural feel in the water, reducing drag and increasing freedom of movement - Lower-profile collar adds comfort and increased durability to ensure that the suit will stay intact and in place - X-MAX Seam-Seal technology uses a triple layer of glue and double-blind stitching to ensure long-lasting waterproof seams - FRONT: 5.0 mm-thick neoprene from neck to ankles - BACK: 3 mm Super GKA neoprene - Fully coated with X-SLICE Composite Skin Coating to reduce drag and friction - High-quality X-FLEX liner lines the entire interior of the suit, allowing the wetsuit to stretch in all four directions and return to its original shape (most mid-level wetsuits only use a high quality liner in the arms) - Yellow X logo on the chest - White X logo on the inside torso lining - Padded arm openings fit closely to the body - Fully adjustable Velcro neck closure - 2" zipper protector flap inside the suit - Sturdy zipper + 30" lanyard with 1" Velcro patch for versatile fastening - Vortex Wetsuits are entirely legal under the new USAT rules and are WTC legal (depending on water temperatures).