Give it your all. This adidas by Stella McCartney training cap encourages you to do exactly that. It keeps hair, sun and sweat out of your face, so you can concentrate on what's in front of you. Really disconnect and leave everything but your house key at home — there's a hidden zip pocket specifically for it. Made with a series of recycled materials, and at least 60% recycled content, this product represents just one of our solutions to help end plastic waste.