REI Flash 45

The REI Flash 45 is a 45-litre multi-day pack built around aluminium stays and a tensioned-mesh (Packnit) back panel with foam padding along its edges — a design that improves airflow between your back and the pack compared to a flat foam panel, at some cost to stability when the load is uneven. The 210D nylon ripstop body with a tougher 400D nylon base is a typical weight-versus-durability compromise for a mid-weight multi-day pack. Access to the main compartment comes through a removable top lid with its own pocket, backed up by side compression straps, two side mesh pockets, a front mesh pocket, and hip-belt pockets — enough organization for the usual needs of a three- to five-night trip. The pack is hydration-bladder compatible and comes with adjustable shoulder straps, a chest strap, and load lifters for dialing in the fit under a loaded pack. It's a solid, moderately weighted choice rather than a stripped-down ultralight pack — a reasonable pick for hikers who want a balance of capacity, comfort, and weight on trips lasting several days.