【Product Description】 Brand: ZAMST Item: Knee Supporter JK-1 Color: Black Size: US M (Equivalent to Japanese size L) Recommended supporter for knee problems during growth spurts For upper elementary school students to high school students during their growth period. It holds the entire knee and reduces stress. Reduces stress on the lower knee Reduces stress on the lower knee The PT pad inside the supporter provides moderate compression, reducing the stress on the lower knee. The compression force can also be easily adjusted with the under strap, which can be attached and detached with Velcro. Achieves a comfortable fit Achieves a comfortable fit Power double russell, which has breathability and moderate compression, provides a comfortable fit and hold. Bending and straightening the knee is smooth with little discomfort. Easy to put on Easy to put on This is a full-open type knee supporter, so it can be easily put on even with shoes on. Compression force can also be adjusted. How to choose JK-1 size Measure the circumference 5cm below the center of the kneecap while standing normally (choose the larger size if the measurement falls between sizes). Size: Circumference below the knee (cm) 35~39 Unused, but without box or instructions.