Maxx-Dri Vest Body Armor Cooling Ventilation Airflow Tactical Vest - Available in 2 colors - Black and White. Light-Weight Under Vest - fits perfectly under your ballistic vest - Allow for fresh, dry air to circulate beneath your body armor to prevent rashes. - Helps reduce perspiration build-up to keep you drier and more comfortable - Please order one size smaller than your regular Tee shirt for snug fitting under your body armor If you don't see your size, please consider to order new Maxx-Dri Vest 1.0 SL by clicking here https://www.amazon.com/Maxx-Dri-Vest-1-0-SL-1-Pack/dp/B071LTJJCV/ref=sr_1_1?ie=UTF8&qid=1498746366&sr=8-1&keywords=maxx-dri+1.0+sl