Made from recycled polyester jersey fabric, this T-shirt offers lightweight comfort as you trek through the mountains or work the crux move of your climbing project. The Deltapeak™ technology offers breathability and quick-dry capabilities to keep sweat from building up when you're working hard on warm days. A high density structure gives added comfort while ensuring this T-shirt is resistant to snagging and pilling. The fabric also features UV protection to keep the worst of the sun’s rays off you. For summer climbing adventures and alpine treks, choose all-day comfort with the men's Speed Fly T-shirt.