TCM4794 Tentree Men's TreeBlend Astir Polo The Astir Polo is back in a new, sustainable fabric. With a blend of organic cotton, recycled polyester and lyocell, this casual collared shirt will feel like you're not wearing one at all. Regular Fit Collared polo Set-in short sleeves Functional henley placket with buttons 2-way medium stretch knit fabric 100% Coconut buttons Super soft, made from recycled materials Bluesign certified fabric Fabric TreeBlend 45% Recycled Polyester / 30% TENCEL Lyocell / 25% Organic Cotton Product Care Wash cold Tumble dry low