The MSR AutoFlow XL Fast Flow 10L Backcountry Gravity Water Purifier Filter is a high-quality pump filter designed for outdoor enthusiasts looking to purify water in the backcountry. Made by the trusted brand MSR, this filter is efficient and reliable for keeping you hydrated on the go. The gray color adds a sleek and practical touch to its design, making it easy to spot and use in any outdoor setting. With its large 10L capacity and gravity-fed system, this water purifier filter is perfect for adventurers looking to have clean and safe drinking water while out in the wilderness.