It is stretchy materials.
To be sure correct size with comfortable compression, Please reference picture 7 of size chart and pay more attention to measure your thigh circumference and calf circumference.
If you found thigh size and calf size at different sizes, this knee brace should be not fit you well.
Recommend to wear on bare legs, this is not recommended to wear on very loose pants.
Please pay more attention as fitting instructions on the packaging card, Upper closure should be longer than lower closure, Otherwise will think it was the wrong size.

Product Features

• THE HIGHER LEVEL HINGED KNEE BRACE(LONGER LENGTH 12″) ,WITH 2 OF REMOVABLE ALUMINUM HINGES,FRONT CLOSURE,because added with 2 of lightest aluminum stays,It’s more stronger. They are flexible supports and especially recommend for people who need reduce knee pain and recovery tendon problems,sports trauma,sprains,athletic compression,arthritis,ligament problems and improve knee stability.Widely usage for all people.
• WE HAVE 9 SIZES THAT WIDELY APPLY FOR ALL PEOPLE: Please use a soft tape to double check 6 inch place at both your upper thigh and your lower calf circumference, and then choose correct size from totally 9 sizes. If you’re between sizes, choose the lower size for extra compression and upper size for reduced compression.
• WRAP ARROUND & OPEN PATELLA DESIGN,Takes you convenience,comfortable compression knee stability,Open patella is important direction guide you wearing knee brace on correct place.Fits both Left & Right knee.
• BREATHABLE NEOPRENE MATERIALS, Latex free, With Advantage of fast drying.
• 100% SATISFACTION GUARANTEE,we promise money back,if you are unsatisfactory. Order now without doubt!