MSR DromLite Bag 4L (Gray) Water Reservoir

The MSR DromLite Bag 4L in Gray is a lightweight, collapsible water reservoir designed for backpackers and hikers who value space and weight savings in their pack. This high-capacity storage bag can be folded down to the size of its own cap when empty, and an elastic bungee cord keeps it tightly secured, making it an incredibly packable companion for any trip.

Constructed with rugged polyurethane film and radio-frequency (RF) welded seams, the reservoir is built for reliable durability on the trail while remaining impressively light at just 150 grams (5.1 ounces). The inside features an improved BPA-free food-grade lining that ensures water tastes better and allows the bag to withstand freezing, adding to its versatility in various conditions.

The DromLite Bag is equipped with a convenient 3-in-1 cap, which lets you fill, drink from, and pour from the bag with ease. A loop at the top provides a secure attachment point for hanging or carrying. For context, the 4-liter model is part of a range of sizes (2L, 4L, and 6L) and, like all MSR products, is backed by a three-year limited warranty against manufacturing defects.