The comfort and functionality make this Columbia Women's Kickin It Tank a first choice for enjoying a day out the trail and in the sun. The high quality materials used to craft this women's hiking tank are what make it so special, while its modern classic fit and color-blocking design provide style and comfort. The Kickin It Tank features some of Columbia's best sun protection technology to help prevent skin damage while outdoors. The fabric is crafted of our signature moisture-wicking fabric to keep you cool and dry while on the run. The comfort stretch 100% polyester fabric is lightweight and allows for full range of motion. Columbia's tank comes in many size categories and in feminine colors as well. To ensure the size you choose is right, utilize our sizing chart and the following measurement instructions: For the chest, measure at the fullest part of the chest, under the armpits and over the shoulder blades, keeping the tape measure firm and level.