The Cocoon has one of the best warmth-to-weight ratios in One Planet's range, making it a popular choice for the lightweight adventurer. The sumptuous, highly breathable 15-denier Vapour Vent is used as both inner and outer fabric; it’s a real weight saver, as is the body-hugging mummy shape. Your down won’t be going anywhere thanks to the combination of vertical chest baffles and our famous V-baffles, while the hood and neck closure stop your warmth escaping. The flexibility of a full-length zip helps your night time metamorphosis into a well-rested, happy little camper.
Cocoon sleeping bags are made using lightweight and highly breathable 15-denier Vapour Vent fabric. This strong, compressible and highly breathable fabric is ‘downproof by construction’: the tight weave keeps the down in but allows water vapour to escape. This reduces the possibility of clamminess and allows the down to loft fully for maximum performance.
One Planet use two qualities of down in their sleeping bag range.
700+ loft DWR-treated duck down is our best value down, used for applications where minimum weight and packed size are not critical. Sleeping bags filled with this down are around $50 cheaper than their 800+ loft counterparts and around 100 grams heavier.
800+ loft DWR-treated duck down is our premium choice – a must for the gram counters. This high-lofting white duck down delivers luxurious warmth at a fine, feathery weight. This down has excellent compactability and loft recovery.
Down is the best insulation for lightweight sleeping bags due to its loft, compressibility and durability. However, this golden fibre has a failing: its ability to insulate drastically decreases when it is wet.
The solution is now here – DWR DOWN. This down has been selected to meet our rigorous standards, with a durable water-repellent (DWR) treatment applied after the cleaning and sorting process.
The benefits of DWR DOWN are:
It absorbs less water in damp conditions
It retains higher loft (insulation) in damp conditions
It dries faster
Cocoon sleeping bags are filled to order with 700+ loft DWR DOWN for great value and 800+ loft DWR DOWN for greater weight savings.
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One Planet sleeping bags are rated using the European Standard EN13537. This means every sleeping bag has two ‘real world’ and one extreme rating. To determine what temperature might be most suitable for you see our technical pages.
Cocoon sleeping bags come in two sizes.
As a general rule, One Planet sleeping bags are a little roomier than other brands. The shoulder circumference measurements (below) give an indication of the internal space in the sleeping bag.
A well-fitting bag will give the best performance. If you need more room, One Planet offer a series of Sleeping Bag Expanders.