The Membrane Solutions Camo Personal Water Filter Straw is a necessity for your tactical and combat survival gear. It has a four-stage filtration system that will ensure the safest water in the worst environments. Compared to other filter straws on the market, it maintains the optimum flow rate while maintaining the filtration accuracy. The filtration membranes have a pore-size of 0.1 microns, filtering out 99.9 percent of harmful substances and improving the taste of the water. This is what really sets the Membrane Solutions Camo Personal Water Filter above all of the others. Making it more convenient to use, it also has a more compact size than other personal water filter straws. The straw is made out of camouflage-patterned food-grade, BPA-free ABS and has an attached cap on each end, plus, it comes with a neck lanyard. Inside the straw is the four-stage filtration system which consists of a coarse filter screen, PP cotton, coconut shell activated carbon and hollow fiber ultrafiltration membranes. This means that you can expect a long lifespan ensuring that it will provide up to 1500 liters (396 gallons) of drinking water.