1.Inside the knee pad sits the silicone bar to reduce the shock and keep your patella stable when you are running, cycling etc. 2.This knee pad protects the patella by adding the pressure from both side. And the built-in EVA anti-bump foam can better provide a sense of security 3.Worried that the knee pad is too thick that your skin cannot breathe? On the rear part of this knee support sits a lot of holes to solve this problem. Get rid of the uncomfortable feelings 4.To better keep this knee support in place, it comes with the nylon hook and loop fastener, which can also match your leg better 5.Once you are exercising, this knee wrap can provide the protection for your meniscus and prevent the patella and ligament injury Specification: Material:Nylon High Elasticity OK Fabric,Composite Eco-friendly Neoprene Size:41x16x7cm/16.14x6.3x2.76" Color:Grey/Gray,Blue,Light Red,Black Theme:Sports Sport Type:Fitness Features:Breathable,Anti Bump,Adjustable Type:Wrap/Strap Weight:39g/0.09lb/1.38oz Left Or Right:Universal Packaged:Opp bag Note: 1.please allow 1-3 cm/ 0.39-1.18 inch difference due to manual measurement and 3-5 g/ 0.007-0.01lb/ 0.11-0.18oz for the difference between different colors 2.due to the screen difference, the color may be a little difference from what you expect, please allow it Packaged include: 1 x knee pad