The OEX Leviathan 900 Ultralight 4 Season Down Sleeping Bag

When the temperature drops, the OEX Leviathan 900UL keeps you warm without weighing you down. Filled with 900g of 85% duck down at 650 fill power, it holds a comfort rating of -4°C, a limit of -10°C and an extreme of -29°C, so it earns its place on genuine four-season trips. At just 1.3kg / 2.9lbs and packing to 42x25x25cm, it slips into a backpack with room to spare. The 20D nylon ripstop shell has a water-repellent finish that keeps the down lofting, night after night.

Roomy Fit With a Handy Security Pocket

Measuring 220x78cm with a 50cm foot width, there is room to stretch out, and it suits users up to 220cm tall. An internal security pocket keeps your phone, keys or cash close and safe through the night, so your valuables never leave your side.

Find the right OEX Sleeping bag for you

	OEX Leviathan 900 UL Add To Basket	OEX Drift 1000 Add To Basket	OEX Fathom EV 300	OEX Fathom EV 400	OEX Fathom EV 350XL Add To Basket	OEX Drift 700 Add To Basket
Customer Reviews	4.5 out of 5 stars14	4.8 out of 5 stars6	4.6 out of 5 stars23	4.3 out of 5 stars11	5.0 out of 5 stars2	3.4 out of 5 stars4
Price	£180.00£180.00	£54.99£54.99	—	—	£65.99£65.99	£43.99£43.99
Season/Best For	4 Season /Winter Expeditions	2-3 Season / Spring to Autumn	3 Season / Autumn & Winter	3-4 Season /Winter Expeditions	3-4 Season /Winter Expeditions	1-2 Season / Spring & Summer
Comfort Temp	-4°C	7°C	1°C	-1°C	0°C	10°C
Limit Temp	-10°C	2°C	-5°C	-8°C	-6°C	6°C
Weight (Kg/ Lbs)	1.3kg / 2.86 Lbs	0.96kg / 2.11 Lbs	1.05kg / 2.31 Lbs	1.125kg / 2.48 Lbs	1.53kg / 3.37 Lbs	0.74kg / 1.63 Lbs
Shape	Mummy	Mummy	Mummy	Mummy	Mummy	Mummy
Fill	Duck Down	Synthetic	Texulate Advance Synthetic	Texulate Advance Synthetic	Synthetic	Synthetic
Compression Bag	Yes	Yes	Yes	Yes	Yes	Yes

• What temperatures is the OEX Leviathan 900UL suitable for?

  A true four-season bag with three ratings: -4°C comfort, -10°C limit and -29°C extreme. That suits cold-weather camping, winter backpacking and high-altitude trips where reliable warmth matters most.

• What is the sleeping bag filled with?

  It is filled with 900g of 85% duck down at 650 fill power, one of the best natural insulators for its weight. The 20D nylon ripstop shell has a water-repellent finish that helps the down keep lofting in damp conditions.

• How much does it weigh and how small does it pack?

  It weighs just 1.3kg / 2.9lbs and packs down to 42x25x25cm. That mix of low weight and small pack size makes it ideal for backpacking and any trip where you are counting grams and saving space in your pack.

• How big is the bag and does it have any storage?

  It measures 220x78cm with a generous 50cm foot width and comfortably fits users up to 220cm tall. It also features an internal security pocket, giving you somewhere safe to keep your phone, keys or valuables overnight.