There are days when you’re torn between the warmth of your sleeping bag and the adventure waiting outside: with the Inversion, you can have both. Inspired by One Planet sleeping bag technology, this jacket offers exceptional performance in extreme cold.

Features include 800-850 loft DWR DOWN, water-resistant shell fabric and zips, box-wall baffles on the body and an awesome hood that fits over a helmet and folds down into a collar. There are also pockets, both external (two hand-warmer) and internal (one zipped and two mesh); a soft-touch chin guard; Velcro cuffs and a drawcord waist.

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SKU: INVERSION Categories: ,

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Pertex® Endurance

Fabric for down jackets must perform two roles: keep the fill in the garment and allow body-generated moisture to get out. The shell fabric must also keep external moisture out in some conditions; in garments designed for extreme use, highly water-resistant shell fabric is preferable.

Pertex Endurance is the lightest, most breathable and weather-resistant fabric we can find. It weighs a measly 36 g/m2, has a water head of 1000 millimetres and a breathability of 7000 g/m2/24 hours (according to results from test JIS L 1099 A-1). You do the comparisons: it’s hard to beat! The fabric combines an air-permeable membrane with a durable nylon face fabric: the membrane is so thin it barely affects the weight or softness of the material, but it is highly breathable and water and wind resistant.

pertex endurance

How to take your measurements

1. Chest: measure around your chest, holding the measuring tape under your armpit.

Note: for an accurate fit, measure yourself whilst wearing your thickest mid-layer. This ensures your jacket fits well as part of your layering system.

CHEST (CM) 87 92 97 102 107 117 122

One Planet DWR DOWN

800-850 loft, DWR-treated duck down is our premium choice. This high-lofting white duck down delivers luxurious warmth at a fine, feathery weight and has excellent compactability and loft recovery.

Down is the best insulation for lightweight insulated jackets 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


Ethically sourced down
Our down is ethically sourced, harvested and cleaned before purchase, with both the down and our supplier passing independent International Down and Feather Laboratory (IDFL) audits relating to ethical traceability. This means that the white down and feathers we purchase are from animals that haven’t been live plucked or force-fed at any point during the supply chain.

The IDFL has been around almost 40 years and has a solid base in China, from where around 75% of the global supply of down is sourced. There are more details on the IDFL here:


Storage and stuff sacks

Your down jacket is delivered in a stuff sack, as this is easiest way to transport it. However, it should not be stored in its stuff sack long-term as this compresses the fill material and may cause damage. Hang the jacket in your wardrobe over a large hanger.

When putting your jacket in its stuff sack, do as its name suggests! Don’t roll or fold it, simply stuff it in with your fist, pushing it down to the bottom of the sack. This allows the fill to settle in pockets rather than being squashed flat.

Don’t over-compress your jacket. If it is compressed too much, the small feather content can be forced through the jacket’s shell. This minor fill leakage won’t drastically affect performance; it is more a nuisance or cosmetic problem. However, storing your jacket in a highly compressed state for long periods could permanently damage the fill material, resulting in an inferior performance.

Cleaning your down jacket

Washing a down jacket can be a daunting process. However, your jacket will perform better for longer if it is kept clean. There are two ways to do this:

Use a professional

This is the easiest way to get your jacket clean. One Planet don’t just make the jackets, we look after them, too. Send your dirty, bedraggled garment to us and it will come back fresh, clean and fluffy. Too easy! Contact One Planet by email or phone for further details on our services.

If using another professional service, ensure they specialise in cleaning down products.

DIY jacket washing

  • Fill a bath with enough warm water to cover your jacket and add a small amount of non-detergent soap. (We use and recommend Nikwax Down Wash.) Be very gentle with your jacket when it is laden with water and do not lift it clear of the water.
  • Gently massage the jacket, pressing down with your open hands, until the fill material is saturated.
  • Leave to soak for one to four hours, depending on the dirtiness of the jacket. Drain the water from the bath, add fresh, warm water and repeat the gentle massage.
  • Continue draining and adding fresh, warm water until all the suds have been removed and the water is clear.
  • Drain the bath and, without moving the jacket, press water out of the fill material until it has all gone and the jacket is merely damp.
  • Fold the damp jacket into a bundle so you can manage it by yourself without letting it sag.
  • Lay the jacket in a clean, shady spot and open it out.
  • Regularly massage and separate the drying fill material until an even loft is achieved.
  • In cold, wet or humid weather, the jacket may be placed in a small room with a heat source to aid drying. Remember to separate the fill material regularly.
  • A down jacket with natural fill will take several days to dry completely. It is important to have good air flow around the jacket, and it should be moved regularly to assist the drying process.
  • Finish the process by tumble-drying the jacket on low in a commercial-sized tumble drier. It is very important to keep the temperature low so you don’t cook your jacket.