Tight fit Crewneck 83% polyester (recycled), 17% elastane Mesh back panels AEROREADY TECHFIT focuses your muscles' energy. This training top is designed for a tight fit and features a crewneck. It is made from 83% recycled polyester and 17% elastane, with mesh back panels for breathability. The AEROREADY technology helps manage moisture, while TECHFIT supports your muscles' energy during workouts.