Recycled polyester cotton shirtingFit: Relaxed Perennially popular, Kiwi classic outdoor shirt is built for the outdoors and is tough enough to endure the rigours of the trail, wherever you're headed. Constructed from sun-protective, insect bite-proof fabric for reliable, effective coverage that's hard to beat. Material composition: 65% polyester, 35% cottonApproximately 19 bottles were recycled to make this product.