Long days outdoors mean big temperature swings and the potential for lots of sun. Be prepared for wind, sun and changing temperatures with these trail running arm sleeves. adidas AEROREADY manages moisture to keep you dry and comfortable, from trailhead to ridgetop and back. This garment is made with a yarn which contains 50% Parley Ocean Plastic — reimagined plastic waste, intercepted on remote islands, beaches, coastal communities and shorelines, preventing it from polluting our ocean. This garment contains at least 70% recycled content in total.