Tank tops are essential for warm weather and the Columbia Sportswear Women's Freezer II Sleeveless Top actually uses an awesome new technology to actively cool you off when you need it most - the hotter you get, the harder it works. When Omni-Freeze ICEŽ fabric gets wet, it triggers a chemical reaction that automatically lowers the surface temperature, making you feel instantly more comfortable. Stretch fabrication is super cozy and wider straps play nicely with undergarments of all kinds. When the sun is really sizzling, built in UPF 50 protection will keep you safe from harmful UV rays.