Mountainsmith Mayhem 45

The Mountainsmith Mayhem 45 is a 44-liter internal-frame pack aimed at trips spanning one to three nights, with construction that leans toward mountaineering as much as standard trekking. The shell combines 210D HT nylon with a 200D Spectra ripstop panel, and a single ice axe loop reflects the pack's dual-purpose intended use across multi-day trekking and mountaineering. Access is hybrid — a top lid plus a front panel J-zip give two routes into the main compartment, backed by one front pocket and two side pockets for smaller, frequently accessed items. Carry comfort comes from a padded, pocketed hip belt, chest strap, and load lifters, and the pack is hydration-compatible, though there is no integrated rain cover. At 1330 grams and about 30.2 grams per liter, the Mayhem 45 is noticeably lighter per liter than its Mayhem 30 sibling, making it a reasonably efficient choice for multi-day trips where mountaineering-oriented features like the ice axe loop matter alongside general trekking use.