Lightweight polyester pique provides soft, durable, and moisture-wicking performance Lightweight, breathable, and wicking knit keeps you cool and comfortable in the heat Ultraviolet protection factor (UPF) of 40 gives you protection during extended periods under the sun Rib trim offers added comfort, stretch, and casual feel Marmot crafts professional quality outdoor gear, born from working mountain guides and instructors. Inspired by the Alpinist spirit of adventure to search and achieve in a harsh world, our products are simple, appropriate, dependable and good looking. Color: blue