This Sea Blue short sleeve sleeve is accented with "glacier" colored graphics on the front and back neck...really cool! Our new bamboo-weave shirts feature a 70/30 blend of viscose bamboo with soft, organic cotton fabric. This special blend lends a soft hand to these durable shirts, which naturally offer wicking, odor control and UV protection. Cut from 5.6 ounce mid-weight fabric, these shirts will do a better job of keeping you cooler, drier, warmer then your old cotton shirts. Bamboo is also a sustainable fiber (the fastest growing plant on earth) that requires little water, no pesticide, and produces more oxygen than trees. The bottom line - these shirts are good for you and good for the environment.