Water is essential when you're out camping or exploring. This water purification straw is an indispensable tool for every outdoor travellers. With this tool, you can can better complete your outdoor adventure. If you are looking for a new water purification straw, come and try this product, it will not let you down. Easy to Use: It adopts the principle of pure physical filtration to directly filter the water into cleaning water that can be directly drunk. It can effectively remove harmful substances such as sediment and bacterium in the water, making your drinking water safer. Wide Applications: Suitable for outdoor travel, hiking, sports, emergency, rescue, outdoor adventure, picnic, backpacking, huntings and emergency preparedness, etc. Lanyard Design: The product comes with a lanyard, you can hangs it on your wrist or carry it on a backpack. Specifications: Material: ABS #43;hollow fiber ultrafiltration membrane #43;carbon fiber Total water purification: about 1000-2000L (There are differences due to different water quality) filter fineness: 0.01 micron Applicable water source: freshes water without chemical pollution (1-3 surface water) Item size: 170 * 33mm / 6.7 * 1.3in Item weight: 70g / 2.5ounce Package size: 190 * 60 * 60mm / 7.5 * 2.4 * 2.4in Package weight: 75g / 2.6ounce Packing list: 1 * Filter Straw with Lanyard