Loose Fit Short Sleeve rash guard is made from lycra/spandex. Great for wearing under the gi or for no-gi and vale-tudo, mma etc training/ competition etc, Designed for grappling but can be used for standup work and all types of cross training. Loose enough for comfort, snug enough not to interfere with grappling. Easier to get on and off then a standard rash guard. Allows moisture to pass trough. Tested and proven to protect your skin.