Choosing a technical mid-layer
To stay warm on the hill you need clothing that can trap air - and a fleece mid layer is just the job.
Featured product: Berghaus Spectrum Fleece
1. Cut
If the jacket is too baggy it will not feel as warm as it could; if it's too tight you won't be able to wear it over other layers.
2. Hood
You can lose as much as 70 per cent of your heat through your head, so you'll need headgear of some description on the hill. Most fleece jackets don't have a hood, but an increasing number do - and they're really useful as they don't blow off like a hat yet can be whipped on and off without having to access your rucksack.
3. Sleeves
You need sleeves that suit the length of your arms and don't ride up when clambering over stiles and rock steps. If you want a jacket for scrambling then it's best if there is no movement in the cuffs or hem. Adjustable cuffs are preferable as they also allow accurate control of airflow to help control ventilation.
4. Pockets
Look for pockets that can be accessed while wearing a rucksack and that are large enough for maps and guidebooks. Mesh-lined pockets add ventilation and save weight.
5. Ventilation
Pure fleece jackets are very breathable, but windproof fleece is not as breathable, so look for other ventilation options in the jacket. An easy-to-use front zip is essential for venting the jacket. As mentioned, adjustable cuffs should allow air to flow up the sleeves when loosened, and mesh saves weight while providing core venting.
6. Fabrics
Fleece mid layers are made from materials that block wind, trap air and resist water. But all the fabrics offer different levels of these three core characteristics. On the hill the perfect fabric offers a high level of warmth, coupled with some wind and some water resistance.
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