Daniel Neilson braves the cold to test some of the warmest sleeping bags on the market. On test Mountain Equipment Snowline SL sleeping bag

There’s no doubt in my mind that in very low temperatures, this Mountain Equipment bag is the bag I’d want to be snuggled in. It’s quite an exceptional bag. It’s not cheap however, at £590. So what do you get for your money. Well, firstly it’s worth saying that Mountain Equipment has one of the most advanced down sourcing policy with their groundbreaking Down Codex (thedownproject.me.uk) that allows down to be traced individually to specific sleeping bags.

So what of the bag itself? It’s filled with 850+ fill power down, one of the highest here, so it’s super warm and one of the lighter bags here. The fit is snug and the EXL inner lining is stretchy which means it hugs your body and makes the warming efficient. The seams are also nearer the ground on each side which minimises some of the draft and heat leakage. There’s a really thick baffle under the zip and an anti-snag strip that works well. The hood is the best here too and is easy to adjust, as is the down collar. The outer shell is Drilite Loft that offers a fair amount of water resistance with a hydrostatic head of 1,500mm. It is great they are producing it in three different sizes too. A great bag if you’re going to be seriously attacking the mountains this winter.

Reviewed in January 2015 Issue