Strauss Adjustable Knee Support Patella, Free Size (Black), Pair With Face Protection Mask, Non Vent, Medium , (Black) Opening relieves pressure on patella Open patella (kneecap opening) for proper flexion of the knee joint Made of stretchable fabric for compression and comfort This Knee support comes with oval pad for extra protection at knee joint Neoprene material helps retain body heat to warm knee joint and aids blood circulation * Ultra light Weight & Comfortable breathing design cut for wider coverage and maximum protection. Proper fit to your face with good comfort and avoids air leakage. Superfine Inner Layers of Fabric ensures additional protection. Smooth inner fabric is breathable and comfortable to wear. * Made from Premium Quality Material, this Face Mask is Anti-pollution, Anti-dust and Anti-bacterial. It has 3 Layer Protection system. Inner Layer provides comfort to your skin during long term wearing. The Middle Layer filters the finer particles and bacteria. The Outer Layer filters the coarser particles keeping you safe.