Features: Innovative concept,when the smarts sensors performs angles monitoring, it automatically triggers gentle vibrations hunchback sensed, reminding you to adjust to the correct postures, finally to form good postures habits relieve back fatigues. (attentions;people with serious back problem should seek helps from a doctor or hospital) Health correction,we recommend that users wear the postures corrector for 2 hour per day. 21 day is the period of habits formation, change wrong habits develop uprights postures, 90 day postures will be significantly improved. you trained to stand straighter, you'll need to use it less and less. Hangers designs,without straps restraint, USB charging,light in weight protable, you can carry it wherever you want to go,the postures corrector can be worn on your clothes at work or daily life inconspicuously. it is suitable for those who have humpback, sore shoulder, uncomfortable waist caused by long sitting at the desk Wonderful gift,sweet warm gift for friend family and yourself. Specifications: Materials:Silicone Color:01,02 Package Includes: 1Piece Smarts Postures Corrector note: Please allow 1-2cm errors due to manual measurement. Due to the differences betweeen different monitors,the picture may not reflect the actual color of the item.