Bullet points:1, outdoor survival gear water needs: if you want, a quick and simple way to get clean water to drink, you can use this survival gear. Mini lightweight Filtration system ideal for recreation, hiking, camping. It is also a great companion for your scout, domestic and international travel, emergency preparedness.2, Durable Design: The outdoor water filter kit is ultra-light and durable, weighing less than 100g, so you can pack it anywhere. It is easy to use and requires no power, batteries or spare parts.3, Durable: Durable membrane microfilters can use up to 1000 liters of water. This will meet your water needs and ensure an adequate supply of purified water in case of emergency.4, Use ocn: such as rivers, streams, lakes, ponds, valleys, and other sources of pollution. A must for every outdoor traveler! It can save your life and rejuvenate you in many unexpected situations!5, simple and practical: fill the bottle with water, securely attach the screw to the bottom of the straw, fit the standard bottle screw; Use gravity, squeeze or drink; When you're ready to drink, carry an empty bottle of water and attach it to a water straw, and add a bag of water filled with water; The tubes fit both ends of the water straws; Some hydration bags require separate adapters; Some filter bags for backpacks. Description:Filters with