Hyperlite Mountain Gear 2400 Southwest 40L - Review 2025

Hyperlite markets their 2400 Southwest as a “Minimalist Overnighter.” Realistically, with a capacity of up to 40L, savvy backpackers can stretch several nights out of the bag without too much trouble. Coming from a company that specializes in doing things under the fast and light flag, the Southwest is Hyperlite doing what they do best. 

It’s hard to talk about ultralight backpacks without getting into the weeds with fabrics. We won’t go too overboard here, but it’s worth noting that Hyperlite packs are built around the notorious Dyneema fabric. The Southwest is entirely constructed from it. This tough, lightweight textile is waterproof and resistant to abrasions- though lacks breathability as a consequence.

Beyond material concerns, the 2400 Southwest has a minimalist design common in ultralight packs- but it’s still a little more than just a bag with a hipbelt. Internal organization is limited, with just the single internal compartment doing all the heavy lifting. In terms of external storage, oversized hipbelt pockets offer more than enough room to store snacks, phones, sunscreen, or other essentials you need to get to in a hurry. There’s also a three stuff pouches along the outside of the pack.

The danger with lightweight gear is dependability The 2400 Southwest is a great example of a trail-proven classic that has successfully seen hikers through to the end of their very ambitious objectives. If you’re looking for an ultralight pack that is guaranteed to do the job, you should start your search with Hyperlite.