Come and see our amazing products. This water filter straw is a camping gear and equipment with 4 step filtration. Hollow Fiber Membrane provide a blockage to suspended solids and create extensive membrane filtration space. The elastic strength of the membrane can get rid of up to 99.9999% tiny matters from raw water.Activated Carbon helps clean out all kind of dirts & enhance water taste. To further ensure the cleanliness of water straight from our camping gear water filter straw.This camping essentials water filter provides 1500 liters (396 gallons) of clean and safe drinking water. Compare with other camping equipment, this filter straw removes up to 0.01 microns pore size of foreign substances in water, also maintains the optimal flow rate (550ml per min) while keeping the filtration accuracy of this hiking gear. Pls confirm with us about the packing info, stock status and exact production time before placing your orders.