Made using 3 Layer Gore-Tex Pro 40D in the main body & hood, then the super burly 3 Layer Gore-Tex Pro 80D in the high wear areas such as shoulders, arms & hips. The face fabric is made up of twisted Nylon yarns maintaining its tough, durable properties but allows the fabric to be more supple & not so stiff. The guys at M.E. have used all of their Storm Construction techniques during the design & build of the jacket. Everything form seam construction, placements & taping; which face fabrics to use, bar tack reinforcement & storm guarded YKK Aquaguard zips. Fort Knox Federal Gold Reserve has nothing on this jacket when it comes to keeping things out. It is built around Mountain Equipment’s “ Mountain Fit” block so it has that little bit of extra room to allow for other layers. The sleeves are pre-shaped & articulated to allow for more natural unrestricted movement. The Mountain HC Hood works with for short periods & great without a helmet so it’s a win win. If you need a snow skirt the awesome it has one of those too, but if you don’t need one the cool thing is you can just unzip it & take it out. The Dual Tether Hem Drawcord allows for greater fit customisation whilst also eliminating the risk of snagging things like ice axes & crampons. M.E have engineered all the pockets on the front of the jacket in accordance with their Stratum Storage System Construction which increases the internal pocket size by as much as 25%; so there is stacks of room for maps, gloves, hats & whatever else you like to store in your pockets. 3-layer GORE-TEX Pro 40D fabric 3-layer GORE-TEX Pro 80D fabric reinforcements Mountain HC Hood is fully adjustable Mountain fit with articulated & pre-shaped sleeves Storm Construction techniques used throughout 2-way YKK moulded Aqua Guard centre front zip Stratum Storage; 4 large pockets with YKK moulded Aquaguard zips & inner bonded edge guard 2-way YKK WR underarm pit zips with laminated & bonded entry Zip-out internal snow skirt Adjustable laminated cuffs & dual tether hem drawcords For all you kit geeks out there, the links below will take you to Mountain Equipments Information pages where they will explain this jackets different fabrics, fills & constructions techniques in greater detail. Gore-Tex Pro Mountain Fit Storm Construction Stratum Storage System YKK Aquaguard Zips