The Alpkit Definition ticks almost every box from a features perspective, says David Lintern.

The Alpkit Definition waterproof jacket is the brand’s mountaineering shell, and it’s exceptionally well thought out; in fact, from a features point of view, pretty much every box is ticked.

Sleeves are tailored to wear under or over gloves; there’s a lower cut tail to prevent ride up under a harness, the three outer pockets are simply huge and stay well out of the way of harness or hipbelt, and the hood has a wired peak.

There’s enough room for a helmet underneath; but, even without, the three-way ‘cordlock’ adjusters mean it doesn’t flap around in a gale and moves with the head when fully cinched down.

There’s a single internal phone pocket, Velcro at the sleeves, two more cordlock adjusters at the hem, a chunky two-way zip on the front as well as a press stud to ease the load on the zip.

There are pit – or rather, ribcage – zips to spill heat and moisture. Ample stormguards are provided on the main zip and the two handwarmer pockets. There’s enough room inside to layer up.

The Definition waterproof jacket claims an impressive 30,000mm of hydrostatic head, and a breathability measure (MVTR) of 20,000 g/m.

There’s no question about its waterproofness; but the outer fabric thickness – an equally impressive 6.6 denier nylon – means that it can feel stuffy in the warmer months.

It’s not the lightweight option here. By the same token, this jacket should prove really durable; and alongside the PFC-free DWR outer treatment and price, that makes the Definition a smart purchase.