Ultralight 40L Stash Pro built for big backcountry and mountaineering days, with roll‑top versatility, full carry options, and a genuinely dialled layout for ski and split missions.

The BCA Stash Pro 40-UL Backpack 2026 is an ultralight, fully featured touring and mountaineering pack designed for long backcountry days where you’re hauling more than just a shell and a sandwich. It runs a 40‑litre roll‑top main compartment (expandable to about 42L) with a curved side access zip, so you can stuff it for multi‑hour tours then cinch it down when you’re travelling light. A dedicated shovel/probe compartment keeps avy tools separate, while a removable internal divider lets you split wet gear from dry or avalanche kit from climbing hardware. Built on an internal support frame with a wire frame sheet, the harness and hipbelt stay supportive under bigger loads, yet the pack still comes in around 1,166 g thanks to X‑Pac VX21 and Robic ripstop fabrics, keeping weight low without turning it into a fragile noodle.

• 40–42L roll‑top volume: 40L standard capacity with roll‑top expansion to about 42L, giving flexible space for big missions or compressed day use.
• Side Stash and access zips: Side Stash pocket for on‑the‑move essentials plus a curved side zip for fast access to the main compartment without opening the roll‑top.
• Dedicated avy tools compartment: Separate shovel/probe pocket keeps rescue gear organised and immediately accessible in emergencies.
• Full ski/board carry: A‑frame and diagonal ski carry plus vertical snowboard carry, with multiple compression strap mounting points and removable helmet carry.
• Supportive yet light frame: Internal frame sheet with wire support frame, hipbelt tool loop, dual hipbelt pockets, and load‑friendly harness for long approaches.
• Durable ultralight materials: X‑Pac VX21 (60% nylon / 40% polyester), Robic 210d extrema ripstop, 100d Robic lining, and DWR‑coated YKK zips, plus moisture drain holes for storm days.