NEMO Equipment Persist Men's 45L All-Adventure Backpack

The NEMO Equipment Persist Men's 45L is a multi-day mountain pack weighing 1673 g, built with a top-loading main compartment plus a side zip for accessing gear without unpacking from the top. The CERO exterior fabric and CCubed back-panel cushioning are paired with a men's-specific fit, hip belt pockets and removable compression straps that let you cinch the load down on lighter days. At roughly 37 g per litre it's not an ultralight pack, but the extra structure is justified by its stated use: multi-day trekking and mountaineering, where you want a stable ride under a loaded pack rather than the lowest possible number on the scale. Side zip access matters most when digging out a layer or stove mid-route without fully opening the top lid, and removable compression straps mean you can strip weight further on trips where you're not cinching down a half-empty pack. This one is aimed at hikers carrying multi-day loads on mountain terrain, not weekend trips where a 30L pack would do.