FIRST-OF-ITS-KIND 2-STAGE FILTER WITH ACTIVATED CARBON: This soft bottle combines a 0.1-micron hollow fiber filter with a second activated carbon filter to remove 99.9% of bacteria, protozoa, odor, and chlorine while improving taste. FAST FLOW RATE: This 1L soft flask filters up to 2 liters per minute, so you’ll have fresh water in no time. EASY TO CLEAN: The proven BeFree EZ-Clean Membrane allows for quick, effortless cleaning without tools. Simply shake or swish the filter in water to remove debris and maintain peak performance. ERGONOMIC CARRYING: The integrated rugged handle makes it easy to hang your BeFree AC from your backpack with a carabiner or rope, take it out from your pocket while running, or just carry it by hand. LEAKPROOF DESIGN: This soft bottle is designed with a robust flip cap, you can trust that not a drop is spilled, no matter how tough the journey. An essential for trail running, hiking, and travel. VERSATILE FILTRATION FOR ANY WATER SOURCE: Activated carbon enhances taste from treated tap water, while the EZ Clean Membrane ensures safe hydration from natural sources. The Katadyn BeFree AC 1L, designed in Switzerland, sets a new standard for portable water filtration. This revolutionary soft bottle combines precision engineering with advanced filtration technology, ensuring clean, great-tasting water every time. Whether you're out on an adventure or going about your daily routine, the BeFree AC 1L soft flask in (slate blue, red, green) delivers great-tasting, clean water wherever you go. Its dual-stage filtration system removes microplastics, 99.9% of harmful bacteria and protozoa, while activated carbon technology reduces chlorine and unwanted flavors for improved taste with every sip. Engineered to filter any water source, this handheld water bottle is ideal for on-the-go use. Drawing from a pristine mountain stream? Skip the activated carbon to savor its pure, natural taste. Enhancing tap water? Simply add the activated carbon pad for a crisp, refreshing experience. Designed for durability with a lightweight single-wall flask, it’s compact and easy to stash in your pack – the perfect companion for those that demand the best.