Product details of 2 Pcs Power Knee Joint Support Pad with Spring Size: 11.5 x 3.5 inches Makes you feel light, allowing you to lift each knee easily as you go along with your activities. Powerful Rebound Spring Force-It works to support your thighs and calves, effectively reducing the pressure on your knees. Breathable Mesh, Non-slip Fabric- It’s comfortable… whether worn directly wrapped around your bare knees or over your pants. Three springs Size: 11.5 x 3.5 inches Makes you feel light, allowing you to lift each knee easily as you go along with your activities. Powerful Rebound Spring Force-It works to support your thighs and calves, effectively reducing the pressure on your knees. Breathable Mesh, Non-slip Fabric- It’s comfortable… whether worn directly wrapped around your bare knees or over your pants. Three springs Specifications of 2 Pcs Power Knee Joint Support Pad with Spring Brand No Brand SKU 214157994_PK-1423002129 What’s in the box Package Includes: 1 x 2Pcs Power Knee Joint Support Pad with Spring - Black