Mammut Trion 50 £195

Mammut’s Trion Spine 50 is a previous ‘Best in Test’ winner in this category. The Trion 50 is essentially the same design, though with a simpler fixed back system that forgoes the brand’s unique double pivoting ‘Active Spine’ tech. So, you don’t get the same custom fit or luxurious carrying comfort – but on the flipside, this version is much lighter and cheaper.

It also adds convenient access to the main body via a big, U-shaped rear zip that runs around the back panel, just below the shoulder straps. We’re starting to see this feature on a few of the latest packs to hit the market, and it’s a bit of a gamechanger for grabbing extra layers fast – always good when you’re out in winter conditions.

The back panel and harness are lightly padded and well ventilated. Fabrics are tough, with a Cordura nylon base. There is loads of useful storage, and we particularly like the big, zipped front pocket.

The pack also has the ability to carry a rope, ice axe, trekking poles and even skis. It features dual side compression straps, hydration compatibility and can be overstuffed thanks to an extended drawcord collar and a floating lid.

IF WE’RE BEING FUSSY

This pack only comes in one size and the back length (18in) isn’t adjustable, so it’ll either fit you or it won’t. An inner lid pocket would also be good.

■ WEIGHT 1.57kg (1.24kg stripped)

■ VOLUME 50 litres

■ SIZES One size

Verdict

A tough, versatile all-round pack that carries well under load, accepts plenty of kit and has very useful features, including quick access to the main compartment.

“Innovative rear access helps you grab your gear fast”