High-quality synthetic t-shirt from Patagonia. Capilene Cool is part of their performance line- these shirts work great under your winter mid layers or on their own for a summer run. The fabric is loose and cool and doesn’t hold as much sweat or stench as a traditional cotton tee. I never wore this because it’s just a little too small for my liking but I have 2 other versions of this exact shirt from Patagonia in larger sizes and I can’t recommend them enough! The color is more of a heathered teal.