The Force Ten brand is synonymous with alpine climbing and more adventurous trekking/backpacking, and the Catalyst 400 is a flagship down sleeping bag that is a great compromise between weight and warmth. It uses 400g of 700 fill power down for insulation, and wraps this in a tough, DWR treated nylon that does a good job of keeping the down dry. It also gives decent warmth for weight making this is one of the warmest bags tested (manufacturer’s comfort rating of 2°C), as well as the lightest of the 3-season offerings at less than 800g. It has a half zip, which no doubt helps keep that weight down – I don’t mind this and didn’t find it a faff to get in and out of, especially as it didn’t snag at all. And once in, the shoulder baffle and hood draw cords are easy to find and adjust and are pretty effective at keeping warmth in. At £280, it’s one of the most expensive tested, but offers a performance to match that price tag and is definitely worth considering.
Review by Tom Hutton @