Purewell Outdoor Water Filter Personal Water Filtration Straw Emergency Survival Gear Water Purifier for Camping Hiking Climbing Backpacking(8PCS)

AUTHORITATIVE CERTIFICATION: Purewell Filter Straw, SGS, TÜV certified, test report ASH15-005515-01, Portable Personal Filter Straw, is a survival gear and emergency equipment. It is essential for camping, hiking, climbing, hunting, trekking, backpacking, biking, boating, RVing, foreign travel and wilderness adventure! 5 STAGE FILTER: The outdoor personal water purifier's 5-stage filtration system, including hollow fiber ultrafiltration membrane, coconut shell activated carbon, mesh plugs, and double-layer medical-grade PP cotton fibers, filters out up to 99.9999% of environmentally unfriendly water, odors, residual chlorine, organic matter, and other microscopic substances (Note: TDS value cannot be reduced to ensure that the essential mineral balance of the water is not affected). FILTRATION ACCURACY: The Purewell Survival Gear Water Purifier removes substances from water with a pore size of 0.01 microns and still maintains an optimal flow rate (550 ml/min) compared to oth