Key Features

• Universal Compatibility: Designed to fit 42mm openings, this filter cartridge is fully compatible with BeFree flasks and other similar water bottles, making it a versatile replacement option for outdoor enthusiasts.
• Advanced Hollow Fiber Technology: Utilizes a high-performance 0.1 microns hollow fiber ultrafiltration membrane to effectively remove impurities, ensuring safe and clean drinking water from streams, lakes, and other natural sources.
• Long-Lasting & Chemical-Free Filtration: With a lifespan of up to 1,000 liters, this durable filter eliminates the need for purification tablets or chemicals, providing a reliable and eco-friendly hydration solution for extended adventures.
• Ultra-Lightweight & Compact: At only 43 grams, our filter is one of the lightest filter options available - its small size takes up no extra space. Perfect for hiking, trail running, cycling, and backpacking, the filter is designed for portability, allowing you to stay hydrated without adding unnecessary weight to your gear.
• Fast Flow Rate & Easy Maintenance: Engineered for quick water flow with minimal effort, it reduces filter-clogging issues. Simply shake&swish with clean water to maintain optimal performance, ensuring hassle-free use on the go.
• Twist-to-Drink Cap: Unique drink through cap for easy drinking. Twist to close for leakproof seal. Hydration made easy.

Specifications