BURN MORE CALORIES: Targeting the upper arms, these bands wrap around the biceps, increasing body temperature with thermal compression in the bicep area during exercise, they warm the arm area and facilitate sweating. The upper arm compression sleeve helps heat fat so you can lose weight at high speed. SUPERIOR CRAFTSMANSHIP: Made from eco-friendly SBROK fabric for ultimate thermal insulation and superior durability. A silver inner layer is used to trap heat and wick away sweat, you can sweat quickly when wearing it during exercise. And workout armbands for weight reduction all keep sweat in and dry out. TRAIN YOUR ARM: The sauna arm heating belt can help you burn arm fat, make arms sweat like crazy, eliminate arm sagging, clean toxins inside the body and give you slimming results . You will change the status of thick arms and fat accumulation, easily practice beautiful arms. Say goodbye to thick arms. It can also help protect your arm when you play sports. All-Day Comfort: Designed with comfortable compression and ultra-thin thermal fabric, comfortable to wear for next level arm training, suitable for various sports such as running, yoga, fitness, ball, sauna, walking, etc. The arm belt is designed to enhance your training by helping to improve thermogenic activity and perspiration, giving you the ultimate sports and fitness experience HOW TO CHOOSE A SIZE: Please measure your arms before purchasing. Unique size: 19.25 inches in length and 5.75 inches in height. Sizes are fully adjustable, creating the perfect fit for your shape and size. Note: The arm trimmer is flexible and it is a little tight at first, wear it in a while, then it will fit your arm well.