Delivering firm muscle support, the 2XU Aero 5" 2 in 1 Shorts are crafted with a PWX inner compression short that works to stabilize your muscles and lowering the risk of injury while increasing blood circulation and enhancing your performance. The fabric is lightweight and stretchy with breathable perforations to ensure you stay cool and well ventilated, while a phone pocket on the internal compression liner and a zipper pocket keep your valuables safe. Finally, reflective detailing keeps you visible when training in low light. Care Instructions Machine wash in cold water with like colors. Do not tumble dry. Hang to dry in a cool shady area away from the sun. Do not use bleach, fabric softeners or dryer sheets. Do not iron.