Hyperlite Mountain Gear Stuff Sack

It is fully waterproof. The combination of Dyneema fabric and the roll-top closure creates a reliable seal that keeps your gear dry even in wet conditions or during water-based activities.

The 4L and 9L sizes are ideal for organizing smaller items like clothing or toiletries, while the 20L and 44L options are better suited for bulkier gear like sleeping bags or extra layers. Consider what you need to keep dry and compressed, and size up if you prefer easier packing.

Dyneema is exceptionally tear-resistant and durable, making it far tougher than standard nylon sacks. However, it is not puncture-proof, so you should still avoid packing items with sharp, exposed edges directly against the fabric.

The roll-top closure allows you to adjust the volume of the sack based on how much gear is inside. By rolling it down further, you can compress the contents and remove excess air, creating a more compact package for your pack.

Yes, they are specifically designed for that purpose. The ultralight construction helps minimize your base weight without compromising on the protection your gear needs over hundreds or thousands of miles.