Important Note-It helps prevent saggy arms from shaking around while walking with the compression support of these sleeves. Only suitable for arm circumference 7.8 - 11.8 inches, please confirm the size before purchase. 2 Pair Included- Comes with 2 pair, best for comfort and best for value. Recommended usage frequency is 4~6 hours daily, please not use it during bedtime. Great for Daily Activities-lightweight arm support sleeves will always keep you comfortable whether you're golfing, fishing, walking, cycling, jogging, driving, traveling, housework or gardening, no matter night or day, anytime, anywhere. Built for Comfort- Thanks to filmy nylon material, the arm shaper sleeves fit smoothly under your clothes to give your arms a slim look, breathable material and comfortable, but firm enough to not slip. Besides, they are easy to clean. Great Arm Compression-Made of high quality nylon and spandex in corrugated design,great arm compression to tone and shape saggy arms, help increase burning of calories and get rid of that underarm giggle. Also great to wear underneath to cover arm tattoos.