Feature: 1. Sauna experience to increase your natural body temperature and stimulate sweating through any type of physical activity. 2. Wearing a sweaty armband while exercising or performing daily activities can create a heat experience similar to a sauna. 3. Your body temperature rises, so you sweat more and lose fat. Increased sweating also helps detoxify and clear pores. Has elasticity. It can compress the excess belly fat and make your arms look more slim. 4. Durability and comfort, extremely light and comfortable, allowing you to wear it for a long time without feeling uncomfortable.It can help shape your body when you work out at the gym, do yoga, ride a bike or just run. 5. Made up of two layers, the inner heat‑producing polymer fiber increases your core temperature, promotes sweating, and reduces fat faster.The exterior is a performance compression fabric with good air permeability. Specification: .Condition: 100% Brand New Item Type: Arm Trimmers Material: Polyurethane Applicable Scenarios: Running, bodybuilding, bodybuilding, cycling, ice and snow sports, etc. Size Upper Mouth Lower Mouth Height S 19cm / 7.5in 23.4cm / 9.2in 17cm / 6.7in M 23.6cm / 9.3in 25.9cm / 10.2in 17cm / 6.7in L 26.1cm / 10.3in 28.7cm / 11.3in 17cm / 6.7in XL 28.9cm / 11.4in 30.5cm / 12in 17cm / 6.7in XXL 30.7cm / 12.1in 32.3cm / 12.7in 17cm / 6.7in Note: This product is elastic, the measurement method is manual, there is a certain error, but does not affect the use. Package List: 1 x Pair of Arm Trimmers