Body Sensors EC2 Quick-Dri for kids. There's no such thing as bad weather, only bad clothing. Body Sensors EC2 Quick-Dri is a high performance base layer product engineered for the active outdoor enthusiast. Polyester/Lycra fabric construction utilizes fine denier 100% spun polyester yarn for warmth and softness. This mid-weight base layer has exceptional performance comfort range making it ideal for a wide range of outdoor activities. The mini ribs form tiny pockets tat trap air to provide warmth without bulk or added weight.