CamDesign Chest Belt Strap for GoPro HD Hero 4, 3+, 3, 2, 1 camcorders + CamDesign Wristband Lens Focus Ring Compatible with GoPro HD Hero 4, 3+, 3, 2, 1 camcorders Comfortable, adjustable, and elastic straps to fit all size Chest strap fits flat on the chest Perfect for skiing, biking, kayaking, and other action sports Can even go over large jackets