Membrane Solutions S2 Water Filter Straw — NSF/ANSI 42/372/401 Certified 4-Stage 0.1µm Portable Purifier, Replaceable Fi

Survival & Backpacking Portable Water Filter — NSF Certified

Certified Performance and Safety - NSF & SGS tested (Test Report NBF21-004693-01) and compliant with NSF/ANSI 42, 372, and 401 standards. Validated to reduce taste, odor and chlorine while using lead-free, food-grade materials. Trusted science-backed protection for safe drinking water on the trail or in an emergency.

Unique Detachable Design - Innovative detachable straw design: both ends disassemble so you only replace the filter element — no need to replace the straw shell. Saves money and simplifies maintenance for long-term use.

Simple Backwash and No Consumables - Detachable mouthpiece connects to a common bottle for easy backwashing — no syringe required. No batteries, no expiration like water purification tablets, and minimal upkeep for dependable use anywhere.

Advanced 4-Stage Filtration - Multi-layer protection: 0.1 µm hollow fiber ultrafiltration membrane, coconut shell GAC (granular activated carbon), plus dual PP fiber pre/post-filters. - Reduces particles, chlorine and heavy-metal traces while improving taste and clarity. Maintains an optimal flow rate up to 500 ml/min and delivers a long service life of at least 20,000 liters.

Versatile Use Modes - Use as a personal straw filter, attach to soft water pouches or standard disposable bottles, or add an extension silicone tube (tubing not included) for greater reach. Also compatible as a gravity-filter replacement to provide potable water for families or groups.

Designed for Outdoor & Emergency Needs - Lightweight, compact and made from BPA-free, food-grade materials. Ideal for hiking, backpacking, camping, travel, survival kits and emergency preparedness — a reliable portable water filtration system adventurers can count on.

Key Specifications - Certifications: NSF & SGS (Test Report NBF21-004693-01)
- Standards: NSF/ANSI 42, 372, 401
- Filtration: 0.1 µm hollow fiber ultrafiltration + GAC + PP fiber
- Flow Rate: up to 500 ml/min
- Lifespan: at least 20,000 liters
- Materials: food-grade, BPA-free

A compact, science-backed portable water filter built to deliver clean, great-tasting water wherever you go — perfect for outdoor activities and emergency preparedness.