Down and its synthetic alternatives are also very packable, allowing you to carry the bags inside or attached to packs when out hiking in the hills. The bag opens and closes with a two-way, anti-snag zipper that allows for ventilation from the feet and from the shoulders when needed. When it’s warm, the dual zippers let you fold back the top of the sleeping bag like a quilt, providing a lot of venting.

Oex Leviathan EV 900 Down Sleeping Bag | GO Outdoors Oex Leviathan EV 900 Down Sleeping Bag | GO Outdoors

For that, however, you get 900gsm of 600 fill power duck down, making the bag lofty, comfy and a joy to sleep in.Its sculpted mummy shape is contoured to follow the body’s curves for thermal efficiency, warmth retention and packability. The advantages are that it makes the sleeping bag noticeably warmer, and stops the bag itself from getting smelly and manky.

OEX Leviathan EV 900 sleeping bag sleeping bag review | Advnture

I would be inclined to go for the PipeDream 600 over the SkyeHigh 900 - lighter, packs smaller, and has the same temperature rating near enough. Although it is sold as waterproof in some marketing material there is also a disclaimer that you obviously can’t lie out in a downpour and expect to stay dry. As such, it’s highly moisture resistant, making it a viable prospect even for cold weather use in predominantly wet climates. Our bodies respond to cold differently, so where one person might sleep soundly in a sleeping bag at -7°C (20°F), somebody else using the same bag might shiver so much they crack a tooth.

The OEX Leviathan EV 900 is a 4-season down-filled mummy sleeping bag sold by UK outdoor retailers GO Outdoors, Blacks, Millets and Ultimate Outdoors. Additionally, the reasonably small pack size and weight of this bag make it a solid all-rounder for numerous adventures. A major element of this kit is a good warm sleeping bag suitable for colder conditions - many summer sleeping bags are lighter and contain less fill, which means that if the temperature drops standard summer family options may not cut it to keep you safe and warm. But thanks to premium 800FP down insulation, it’s also competitive in terms of both weight and packability for a bag of this class. The fill is treated with a hydrophobic finish, while the shell fabric is made from Gore-Tex Infinium.

OEX Leviathan EV 900 Sleeping Bag | Millets

Though overkill, you can also use it as a blanket in the summer if you poke a leg out of the side, and the durable outer material is protective and comfortable to sleep in. The stuff sack does help to reduce the overall size of the bag, but a more helpful compression sack with side straps would be nice. One of the key features of this sleeping bag is its vertical baffles – this design helps to keep the down evenly distributed throughout the bag and prevents cold spots from forming. In its latest iteration, Kelty increased the size of the foot box to make it non-constrictive for most feet. A top-quality 4-season sleeping bag, the Andes Infinium 800 is well equipped to deal with temperatures that drop way below freezing.When it comes to the best 4-season sleeping bags, one thing is for sure: unless you find yourself camping high on an 8000-meter peak or in Antartica, you should be fairly warm. The most heavy duty bags with comfort temperates of below -10°C (14°F) can weigh well over 3kgs, in fact, and will barely fit into a 60L rucksack. In our experience, we’ve comfortably slept in this thing in nothing but baselayers down to -5 or -6 degrees Celsius, though we wouldn’t push it further than that without a liner or without wearing a warm jacket inside. The Kelty Cosmic Down 20’s is unusual in that it uses trapezoid-shaped baffles to provide insulation.