UOG TOP PICK For Lightweight, High-Flow Filtration Simplicity: With rapid flow, effortless cleaning, and broad compatibility with 42 mm-thread bottles.Katadyn says:Filters up to 1000 liters, depending on water quality. Works with all BeFree Systems (42mm) except Gravity versions.Our VerdictThe Katadyn BeFree Replacement Filter Cartridge Black Edition is a solid option whether replacing a tired filter or building a lightweight setup using a 42 mm-thread bottle. It delivers impressive filtration and a flow rate thats among the best Ive used.Ive found the cleaning system incredibly slick: a quick shake or swish in clean water and its good to go again. No backflushing or special tools are required, making it ideal for longer trips where simplicity matters. It threads directly onto Katadyn soft flasks and plenty of third-party bottles too, so theres some flexibility in how you use itthough it wont suit standard narrow-neck options.Like all hollow fibre filters, they need to be protected from freezing once wet, and their lifespan will vary depending on water quality. Still, it’s a dependable bit of kit for fast, reliable filtration in a trail-friendly form.- Reviewed by Ultralight Outdoor GearFeaturesFlip CapActivated CarbonSpecificationsWeight: 32gHelp & advice:The Ultimate Guide to Water Treatment and PurificationTime-Saver Guide to Water Purification

UOG TOP PICK For Lightweight, High-Flow Filtration Simplicity: With rapid flow, effortless cleaning, and broad compatibility with 42 mm-thread bottles.Katadyn says:Filters up to 1000 liters, depending on