1. Straighten the back and put the posture corrector shoulder brace on. Tighten all the straps so you feel no discomfort. 2. Wear the clavicle brace for 15-20 minutes for the first 3-4 days, then add 20 minutes every day. 3. You may feel uncomfortable for the first 3-4 day, but later you'll get used to wearing the posture corrector therapy back brace. ATTENTION! Don't pull the straps too tight - it may worsen blood circulation.