I/O Bio Merino Altitude Zip

This layer is designed to fit close to your body for maximum performance, so it’s tight, but soft and still has extra give for comfort. It’s the perfect layer for any activity you have planned especially if it involves different temperatures. Unzip your top for mild weather, zip up and use your thumb holes when the temperature drops. The high collar helps hold warmth as well. The thumb loops keep your hands warm and stop your sleeves from riding when layering. 96% natural merino 4% elastane Rust color