I Know I Hike Like a Girl Try to Keep Up T-shirt Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester Imported Machine wash cold with like colors, dry low heat The Best T-shirts for Hikers Hikers Mountain Tree Trekking, Camping Pole Alpine Nature Lightweight, Classic fit, Double-needle sleeve and bottom hem