The Katadyn Hiker Microfilter is one of the best selling microfilters in the US outdoor recreation market. The lightweight and easy-to-use design is the best choice for all around use.Lightweight and easy to use. Unique, pleated cartridge design provides fast and easy pumping. AntiClog Technology with 0.2 micron glassfiber (no cleaning needed). The Activated Carbon core reduces pesticides and chemicals, producing fresh tasting water. Comfortable, sturdy handle makes it easy to pump. EasyFill bottle adaptor connects directly to all common water bottles for convenient filling. Acorn prefilter works in all water conditions. Includes carry case. Convenient and handy for 1-2 people (e.g. while hiking or trekking). Compatible with hydration bladders. Wt. 11 oz. (310 g).