• 1Material:Cotton, Sponge. Good elasticity, breathable fabric, lightweight and more comfort • 2Suitable Occasions:Runners - Basketball - Weightlifters - Martial Arts - Joggers - Athletes - Cyclists - Tough Mudders - Field Sports - Cross Training - Gym Workouts - Hiking/ Trekking - Office Workers - Long distance travel • 3 Fit for leg circumference :(knee above 3.94 inches)14.96 - 20.47 inch Collision Avoidance sponge pad care. Effectively impact resistance, increase blood circulation, provide freedom of movement • 4 Non-slip design of inner layer: provides optimum stability, keep your knee pads stay tight and snug during your whole workout • 5 Muscle Recovery and Prevent Injury :Keep warm, prevention and reduction of stiff muscles and joints. Ideal for sports such as wrestling, volleyball, cycling, football, basketball, skating, dance and or caving, etcNon-slip design of inner layer provides optimum stability, keep your knee pads stay tight and snug during your whole workout/fitness/outdoor activity. Retains body heat to warm the knee joint and increase blood circulation Provides compression for weak or over stressed for the knee . This Knee thickening sponge rubber cushion anti-collision knee pad ,it is ideal for football basketball, badminton, tennis, track and field and many other sports in case of hurt , injury ,Arthritis ,Swelling ,which is a necessity to Relieve Pain . The package inside is 1 pair kneepads,high density sponge shock absorption protection, effectively resist the impact force. Fit knee cricumference 14.96 - 20.47 inch (knee above 3.94 inches), which is a standard size suit for most of you, the elastic tension and compression cover protect your knee greatly.