Nike Therma-fit 360 Neck Warmer 2.0 L/XL (Black/Silver therma fit fabric Heat transferred reflective detailing for enhanced visibility in low light condtions. Therma-FIT fabric to help keep you warm and insulated. Retains insulating properties even in wet conditions. Keeps cold air out and warm air in even in without the extra bulk. UPF 40+, Machine Washable for easy care