Ultra thin， stretchy， breathable， anti-bacteria， radiation proof， comfortable， and safeHelps burn the excessive fat while sleepingBreathable， comfortableAdjustable With buttons Anti-slip natural rubber for scalp Keep young and face slim while sleepingSize base on measure the circumference of the face.Circle around the face with a ruler.Material:85% nylon， 15% elastic resin， special natural rubberColor:BlackSize: approx. 22"-22.8" (56-58cm)Weight:about 65gUsage Note: 1. Do not bleach.2. Handand washed， air dry.3. Do not use dryer drying. Package: 1 x V-Line Face Cheek Chin up Slimming Belt