Osprey Pack Liner

This liner is designed for packs ranging from 50 to 70 liters. Because it has a rectangular shape and a flexible roll-top closure, it fits most standard trekking packs in that size range, though it works best in packs with a traditional top-loading design.

It is built with waterproof-coated 40D Nylon Ripstop fabric and features fully sealed seams. While the roll-top closure provides a high level of protection against rain and splashes, it is not intended for submersion.

The rectangular shape is actually designed to maximize space efficiency by filling the corners of your pack that rounded liners often miss. It is flexible enough to conform to the internal shape of most hiking packs once you start filling it with gear.

It is extremely lightweight, weighing in at just 0.24 pounds (about 109 grams). It provides significant weather protection without adding noticeable bulk or weight to your setup.

While its primary purpose is weather protection, the liner acts as a single large compartment inside your pack. It is best used to keep your sleeping bag, clothing, or dry items together, though you may still want smaller packing cubes inside it for finer organization.