Product Description Breathable knit soft fabric, non-slip silicone strap, can be used for sports, tennis, bicycle volleyball, jogging, weightlifting, skateboarding, triathlon, walking, hiking, wrestling, skiing, golf, football, zumba, climbing , gymnastics, weightlifting, yoga, squatting, baseball, football, bodybuilding, martial arts, running, dancing, fitness, exercise and other fitness exercises. Woven three-dimensional structure, high-precision 3D knitting cutting technology. Ergonomic design: 360° perfectly fits your knee flexion and uses a high-elastic, tight-breathable compression fabric to reduce knee pressure and pain Knee pads, no allergies and itching; metal spring brackets and silicone pads are not easy to fall when used; non-slip silicone strips and highly elastic fabric to avoid sliding up and down during movement. Articulated knee support technology: silicone pad around the knee, double-sided metal spring bracket close to the knee joint. These special features enhance side support and maintain joint stability. It effectively dissipates pressure, keeps the knee warm and lubricates the joints. The best choice for exercise and pain recovery. Material:  Nylon Spandex Knee sleeve length:  30-31 cm / 12 inch Application:Knee pain, discomfort, mild strain/sprain, joint fatigue, keep knee warm, rehabilitation after injury.   Size Guide: M( Suitable for Leg circumference: 35-41 cm / 13.78 -16.14 inch) L( Suitable for Leg circumference: 42-47 cm / 16.54 -18.5 inch) XL( Suitable for Leg circumference: 48-55 cm / 19 - 21.6 inch) XXL( Suitable for Leg circumference: 56-62 cm / 22 -24.4 inch) NOTE: The size is measured by hand, please allow 1-2 cm error. Friendly reminder:If the size you bought does not fit you anyhow, please request for an exchange. Package Content:  1 x Knee Sleeve