It is the simple, lightweight, and compact option for camping and backpacking. The optimized filter cartridge offers a high flow rate and the ability to remove sand and mud without clogging. The filter size of 0.2 microns filters out 99.999999% of bacteria, 99.999% of parasites, and the same amount of microplastics. The water storage bag is made from high-quality materials, BPA-free (without plasticizers), ensuring a long lifespan. The 3-liter water bag is extremely versatile and leak-proof as a storage system. The unscrewed straw filter can be used alone or with a regular water bottle. Enhanced microfilter performance: The revised membrane and special backwashing accessories provide better performance against sand and mud, maintaining flow over a long period. The membrane microfilter lasts up to 2000 liters. Included are the LifeStraw Peak Series 3L gravity bag with hose and standard quick connector, carabiner, leak-proof cap for water storage, easy carrying strap, backwashing accessories, and user manual. Your purchase makes an impact: 1 purchase = 1 year of clean water for a child.