To keep it simple, here’s a guide to One Planet references.

Loft: a measure of how efficiently the down traps air. The higher the loft, the ‘fluffier’ the down and the better the insulating power.

Composition: the ratio of down to feather in a bag, given as a percentage. For example, 90 per cent down, ten per cent feather.

Species: goose down generally achieves better loft than duck, with the best down coming from mature, free-range birds from extremely cold climates.

The quality of down in a sleeping bag makes a huge difference to the performance of the bag, in terms of warmth, weight, durability and compactness. However, often there is very little information provided about a bag’s fill, making it very hard to compare.

All down used in One Planet products is independently tested by the IDFL (International Down and Feather Laboratory and Institute) for loft, composition, species and cleanliness. Our test results are accurately recorded on the quality label inside the foot of each sleeping bag. (Please note: traces of down and or feather of different species and colour than that noted on the bag may occur.)

One Planet sleeping bags use four qualities of down.

Duck – 700+ loft
700 loft (in³/oz US) or 380 (cm³/g EU)
Our best value down. Used for applications where minimum weight and packed size is not critical.

Duck – 750+ loft
750 loft (in³/oz US) or 414 (cm³/g EU)
This down has excellent compactability and loft recovery, with a long user life.

Goose – 800+ loft
800 loft (in³/oz US) or 424 (cm³/g EU)
Same characteristics as the 750 loft duck down, just a little better and a little more expensive.

Goose – 850+ loft
850+ loft (in³/oz US) or 447 (cm³/g EU)
Very extravagant! Used in our Customline bags.

Fill ratio

Most people move in their sleep, so loading the top of the bag with lots of extra down isn’t necessarily effective. We use a fill ratio of approximately 55/45, with 55 per cent of the fill in the top of the bag where it provides maximum warmth.

Filled to order

One Planet sleeping bags are hand-filled, to order, in our Melbourne factory. This dramatically reduces the time a bag is spent compressed in its stuff sack.

All One Planet down sleeping bags (except the Booster Bag series) use sewn-off box wall baffles made from Baffletex, a lightweight mesh fabric that is extremely strong for its weight. Baffletex is air-permeable, with a one-way stretch knit that serves a number of purposes. The one-way stretch allows fill material to loft to its full potential, without leaving gaps. It also acts as a shock absorber within the bag, preventing damage from baffle blow-out, while the texture of the mesh 'grabs' the fill material and minimises shifting.

Zips

All One Planet sleeping bags use YKK zips, because the last thing you need is a busted zip… The zips are bi-directional, with twin zip sliders allowing you to vent the bag from the foot on balmy nights. (The exceptions are the Cocoon, which only has a half zip, the Winter Lite where the zip does not go across the feet, and the Stowaway and Booster which have one-way, continuous zips.)

Providing you have a left- and right-hand zip opening, most of the range will zip together. (However, joining two bags together will actually decrease their thermal efficiency. Cocoon, Stowaway, and Booster bags will not zip to each other, or any other bag.) The zip pulls glow in the dark to save fumbling in the dark, while fabric near the zip is firmly sewn off to prevent the slider snagging.

One Planet mummy and tapered rectangular bags have ground-level zips and seams, with the vertical baffles wrapping right over your body to the ground. In contrast, the side seams of conventional bags are at the midpoint of the bag, allowing the insulation in the bottom of the bag to fall down away from the seam, creating cold spots.

Differential cut

All One Planet sleeping bags have a differential cut, with the inner fabric cut narrower than the outer shell. This reduces fabric waste, promotes proper lofting of the down, and protects the fill from compression.

Hood and foot

‘If your feet are cold, put on a hat.’ So the saying goes, and if you substitute hood for hat, you’ll understand why we go to so much effort. The hoods on all mummy and tapered rectangular bags are shaped to contour to the head, leaving only the nose and mouth exposed. They integrate with the neck muff and shoulders and can be cinched tight without compressing the fill. Three-dimensional foot cavities are used on all One Planet mummy and tapered rectangular bags (except the Stowaway), preventing your toes from compressing the down and causing cold spots (and cold toes!)

Pillow slip

The Bush Lite, Cocoon, Winter Lite and Zephyr all come with a pillow slip that simply clips into position. Fill it with spare clothing to make the perfect camping pillow, and throw it into the washing machine when it gets dirty.