The latest innovation from renowned UK down specialist PH Designs (PHD) is something the company is calling ‘Sleep Systems’. It’s a series of recommended mix and match combinations of lightweight down sleeping bags, supplementary bags and down clothing that’s reckoned to be not only lighter than just carrying a single sleeping bag, but also more adaptable to conditions and easier and neater to pack and carry.
Of course combining sleeping bags and clothing is nothing new, mountaineers and lightweight backpackers have been doing it for years, but this is the first time a manufacturer has come out with a series of specifically recommended combinations for different scenarios and environments and done the hard statistical legwork for you by telling you exactly how much each set-up weighs.
Think of it as choosing from a menu of different ingredients to make your ideal dish and you won’t go far wrong. These include PHD’s selection of lightweight conventional sleeping bags, down jackets and trousers, down had-bags and filler bags which sit inside the main bag to add warmth or over-bags that layer over your existing sleeping bag.