The fitness arm shapers are made of spandex, soft and elastic, comfortable to wear, makes your arm look slimmer. Promote sweating for faster weight-loss results. The outer performance compression fabric provides compression on inner arms, supporting and warming up your muscles promoting improved blood circulation. Arm sleeve no irritates the skin, and easy to clean. They will increase the body temperature to burn fat for the upper arms around the wrap, also can provide basic protection to your upper arms while doing exercise. Flexible and lightweight design, and the closure is very strong, can be adjusted according to your shape and size, suitable for both men and women and dont slide down. Also can brings a hot sauna-like experience targeting your arms, can maximize your workout efficiency, accelerate calories burning, lose water weight, slimming arm fast, mold perfectly with your arms. Specification: Material: Spandex Size Chart: S/M: Upper: 24cm/9.45inch, Lower: 22cm/8.66inch, Height: 21cm/8.27inch, Recommend: 23-33cm/9.06-12.99inch L/XL: Upper: 28cm/11.02inch, Lower: 26cm/10.24inch, Height: 21cm/8.27inch, Recommend: 27-37cm/10.63-14.57inch XXL/3XL: Upper: 32cm/12.6inch, Lower: 30cm/11.81inch, Height: 21cm/8.27inch, Recommend: 31-41cm/12.2-16.14inch 4XL/5XL: Upper: 36cm/14.17inch, Lower: 34cm/13.39inch, Height: 21cm/8.27inch, Recommend: 35-45cm/13.78-17.72inch Package Includes: 1 Pair Slimming Arm Sleeves Note: Color might be slightly different due to the color calibration of each individual monitor. Please allow slightly measuring deviation due to manual measurement.