The Ultra CHILL Crycompression Ankle Sleeve stays flexible while frozen to provide 360 degrees of compression therapy to promote reduced swelling and improve circulation for healing and recovery. Slip on, chill out, and let Ultra CHILL do the rest. Two sizes available, S/M and L/XL. Fits either ankle. Package of one. S/M (Men's shoe size 4-12, Women's 5-13) L/XL (Men's 12+, Women's 13+) Features: Advanced Cooling Technology : Maintains an optimal cooling and compression to soothe your aches and pains effectively without the risk of frostbite Ergonomic Design : Designed specifically for the ankle. Conforms seamlessly to your ankle, ensuring maximum cold therapy and compression Easy to Use : Slip on, chill out, and let Ultra CHILL(TM) do the rest