Never used still with instructions.

The MSR TrailShot Microfilter water filter is a high-quality pump designed for filtering water on the go, perfect for camping and hiking adventures. Made by MSR, a reputable brand known for their outdoor gear, this microfilter is compact and lightweight, making it easy to transport. Originating from Germany, this product ensures reliable filtration capabilities to provide clean and safe drinking water in the great outdoors. Ideal for ensuring hydration while exploring nature.