The Women's Alpha Flux Jacket is a lightly insulated, highly breathable, mid or outer layer, designed with Polartec Alpha ‘Direct’ technology and stretch fleece for multi-season active use.
The Women's Alpha Flux Jacket's outer shell is a new super-soft, breathable and durable, woven fabric. Our Thermic-lux™ stretch fleece has then been added in strategic areas of the body to allow freedom of movement and to keep bulk and weight down. The result is an ideal insulation piece, created with Polartec® Alpha™ “Direct” 90 insulation, perfect for coping with changeable conditions from early Spring right through to late Autumn.
Worn as an outer layer the Women's Alpha Flux Jacket keeps your body temperature in balance when you need a degree of warmth while working hard in the mountains. It also serves impeccably as a warmer, fast drying mid-layer in windier, cooler conditions.
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Rab's Alpha Flux Jacket uses Polartec Alpha breathable insulation, a more modern version of a lightweight fleece, that keeps you warm but lets sweat out, even when active. Polartec Alpha Direct insulation is basically the same but with the mesh liner removed, so you get more unimpeded airflow (not to mention less weight and bulk) without sacrificing warmth. It also feels super soft against your skin!
Designed to be worn when you are active - so on the move - there are alternative insulation garments that are more suited to wearing around camp - Polartec Alpha is about keeping you vented even though you are also being kept insulated. In truth the insulation value is quite moderate so it only really comes into its own when you are exerting yourself and you need insulation but can easily get clammy if the garment doesn't breath.
Its quite a breakthrough, especially for cold weather walking when you need insulation but start sweating hard when you reach a strenuous bit. Weight for weight Polartec Alpha is only about half as warm as Primaloft so the king of insulation keeps its crown - but Alpha has its place - I recently wore an Alpha garment all day while walking in Corsica in particularly cold conditions and stayed warm & comfortable for the duration - I kept checking my baselayer, which stayed completely dry.
This Alpha Flux jacket only has insulation in the back and front torso, and the sleeves, the sides have a stretch panel for breathability and comfort and the hood is made from the same un-insulated material. The outer shell fabric has a high stretch performance as well so that the whole garment stretches and moves as you do. Thumb loops offer flexibility of use, the hood has no adjustment - its a simple stretch fit.
- Reviewed by Ultralight Outdoor Gear
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