How It Works: The corrugated fabric design creates friction on your skin while you're exercising. This simulates your blood circulation during movement, and simultaneously it helps massage your arms in order to tone and slim them. Wear it to the gym along with your workout session or wear it as your taking a walk to the park. Lightweight and thin material makes it stay hidden underneath your clothes. Product Features: 1. Great for slimming arm shaper fat buster off cellulite wrap belt band, helps increase burning of calories. 2. It helps prevent saggy arms from shaking around while walking with the compression support of these sleeves. 3. Recommended Usage Frequency: 4~6 hours daily (not during bedtime). Specifications: 1. Material: 78% Nylon / 22% Spandex 2. Length: Approx: 7.8-12in 3. Quantity: 2 Pairs 4. Color: Black,Beige,Black+Beige Notes: 1. We do not suggest this product if your arm circumference more than 13 inches. 2. Please kindly note that the average life of the arm shaper sleeves is 2-4 weeks, depending on its using frequency, thus 2 pairs of arm shaper sleeves are provided. 3. Please kindly note that the arm shaper sleeves are reusable and washable. please not bleach them or use a dryer. 4. If any discomforts happen, please take them off Package Included: 2 Pair black upper arm shaper massager