The RapidPure^® Scout Inline Purifier gives you the power to filter and purify water in an ultralight water purifier that integrates with your hydration pack, perfect for hiking, hunting, running, or biking. Weighing only 2.7 ounces, this water purifier works with standard or pressurized hydration packs. More than a filter, the Scout removes over 99.99% of viruses, bacteria, parasites, sediment, and more, and works even after being frozen. The ultra-fast system requires no pumping, priming, or batteries, making this inline filter also the best water purifier for high intensity activities.