Ideal for fast and lightweight water filtration outdoors HydraPak's Flux & Filter 1.5L removes bacteria and protozoa from approx. 1,500 litres of water at a rate of >1L per minute.Features: High-performance materials with a PFC-free coating to resist water and dirt and help increase the lifespan of your bag. Compact, uniquely shaped to be shorter, more stable and easier to fit in pack pockets than standard hard bottles. Rolls up when empty for space saving storage. Fast & safe filtration, the integrated filter removes escherichia coli bacteria, cryptosporidium parvum cysts, and giardia lamblia from approximately 1,500 litres of water at a rate of >1l per minute. Dust cover & high flow nozzle keeps dust off your drink nozzle. Quickly opens and closes the drink nozzle with one hand without any direct contact with dirty hands. High flow nozzle, twist to drink nozzle drinks like that of a traditional wide mouth bottle but with more flow and less splash. Fits in pack pockets, designed to fit in pack pockets when full and to roll up when empty for space-saving storage. Flexible bail handle for comfortable carrying, quick attachment and filling in a lake or river. Effectively removes common waterborne bacteria, such as E. coli (99.9999%), and parasitic cysts (99.999%) per EPA Guide Standards and NSF P231 and microplastics (99.999%) per NSF 42 greater than or equal to 3.0 microns in size. 100% BPA & PVC free, wide working temperature range (can be frozen - max temp 60° C / 140° F). Specifications: Capacity: 1.5 l / 50 fl oz Weight: 143 g / 5.0 oz Dimensions: 250 mm x 115 mm / 9.8 in x 4.5 in Materials: tpu, pom, abs, hollow fiber, silicone