The Lifesystems Micro Net Single is impregnated with EX8 Anti-Mosquito treatment, so the mesh repels mosquitoes, rather than merely keeping them out. This treatment lasts approximately two years or 35 washes. A nylon skirt protects the mesh when folding it under a mattress. It is made from a durable and lightweight polyester mesh, and with 156 holes per square inch it exceeds the World Health Organization netting specification. FeaturesEX8 Anti-Mosquito treatment to repel mosquitoes - treatment lasts approximately 2 years or 35 washes.156 holes per square inch - exceeds WHO netting specification. Nylon skirt - protects the mesh at base of net.QuickHang System - includes spreader bar and adjustable cord.Included stuff sack - easy to transport.