We hike down dry river beds, bushwhack through scrub, and explore slot canyons with Hyperlite Mountain Gear's 2400 Southwest 40L Backpack storing everything we need for a minimalist overnighter. Despite its ultralight weight, the Southwest is surprisingly comfortable and durable enough for long hikes. Its Dyneema Hardline suspension system includes spacer mesh foam at the shoulder straps and waist belt, and there are supportive aluminum stays that we remove for even less weight.