Lightweight, back zip spring wetsuit with a high-performance Smart Fiber 4-way stretch fabric front and back torso Premium 8-ounce 4-way stretch fabric sleeves and side panels. Ideal for athletes looking for a performance boost, as the mineral-enhanced Smart Fibers convert body heat into beneficial infrared energy that helps enhance endurance and speed recovery. Comfortable, snug "second skin" fit, with a flattering cheeky bikini cut (medium coverage) XCEL CELLIANT AND THE FDA - The FDA has determined Celliant be regulated as a medical device and is subject to enforcement discretion. The official indication for use (IFU) is: Temporarily promoting increased local blood flow at the site of application in healthy individuals.