Columbia Anytime Tank The tank's fabric provides a UPF sun protection factor of 15, thanks to the Omni-Shade technology. The slim fit and keyhole design makes the Anytime Tank as fashionable as it is functional. Equipped with Omni-Wick technology, the Anytime Tank will keep you cool and dry even in the hottest of elements. Made out of 12% stretchy elastane jersey fabric, you'll have complete freedom of movement.