'll be compressed by your body weight. The fabric used is lightweight Pertex Quantum and there's a hood, quarter-length zip and box foot.Overall weight is just 400g and it packs down to a 'grapefruit-sized package' - see the pic on the right. OMM hasn't temperature

to use in our damp winter climate without fearing the damp.The other significant feature is a sort of zoned construction. The whole jacket is shelled inside and out with ultra-lightweight Pertex Quantum GL, stuff that's downproof, but also so fine you can

hybrid thing using a mix of a fabric called FlashDry in the sleeve area combined with 800+ fill power down insulation over the torso.There's an insulated collar for comfort and warmth plus a windproof hood. The down is housed in Pertex Quantum GL micro

, but without compromising durability of versatility.The Firelight bags use mega high-spec down - 900 fill power (EU) / 970 fill power (US)  - housed in box-wall baffles made from mid-weight Pertex Quantum to maintain fabric tear strength. The bags are mummy

the baffles, but that's pretty standard for lightweight down clothing and sleeping bags.The Nylon shell fabric isn't as light as some - think Pertex Quantum GL - but still feels pretty fine and is treated with Omni-Shield water-repellent technology to cope

's not to be confused, as we eroneously did, with Pertex Quantum GL, this fabric is proprietary to MHW.And despite the fineness of the material, MHW UK say that it's surprisingly tough and has survived several adventure racing bike crashes while being used in windproof