Details: Next level protection against heavy metals including lead as well as bacteria, parasites, microplastics, and organic chemical matter like pesticides, and herbicides Versatile water filter can also be used in 4 ways. Ultralight with high throughput, weighs only 6.94 oz (0.43 lbs), and capable of filtering 1 liter every 2 mins This product gives back: one product, one school child, one year of clean water Lifestraw Flex With Gravity Bag