- AUTHORITATIVE CERTIFICATION: The Filter Straw is SGS and TÜV certified, with test report ASH15-005515-01. This portable personal water filter is a crucial piece of survival gear for camping, hiking, climbing, hunting, trekking, biking, boating, RVing, and wilderness adventures. - ADVANCED 5-STAGE FILTER: Our outdoor water purifier features a comprehensive 5-stage filtration system. It includes a hollow fiber ultrafiltration membrane, coconut shell activated carbon, mesh plugs, and double-layer medical-grade PP cotton fibers. This system effectively removes up to 99.9999% of contaminants, including odors, residual chlorine, and organic matter, ensuring safe drinking water while preserving essential minerals. - HIGH FILTRATION ACCURACY: The Survival Gear Water Purifier boasts a pore size of just 0.01 microns, allowing it to filter out harmful substances while maintaining a remarkable flow rate of 550 ml/min. This efficiency sets it apart from competitors that only achieve 0.1 micron filtration. - LONG-LASTING PERFORMANCE: Each Filter Straw provides up to 1,500 liters (396 gallons) of clean drinking water. The included 8.7-inch hose allows for easy drinking without bending down. It is compatible with any 28mm threaded bottle and weighs less than 3.5 ounces, making it easily portable in your hand, pocket, or survival kit. - PRACTICAL USE SCENARIOS: Ideal for outdoor enthusiasts, this filter is essential for refilling water bottles during long hikes, ensuring access to clean water while camping in remote areas, or providing peace of mind during international travel where water quality may be questionable. This compact and efficient water filter is a reliable companion for all your adventures, ensuring you stay hydrated with safe drinking water wherever you go.