The Fitzroy Jacket is packed with Prima Loft Gold (100g fill in the body with 60g in the arms & hood). The Prima Loft Gold is the rebranded Prima Loft One. It rivals the weight & compressibility of down & keeps you warm when wet; what more do you want from your insulation layer? The Drilite Loft II outer fabric is a totally windproof & highly water resistant. Drilite is a Nylon fabric that is hard wearing yet light enough to allow the insulation to fully loft; therefore it can trap more arm air keeping you nice & toasty. The Fitzroy jacket features Shoulder Shield Construction which is a one piece shoulder & arm panel & a dual layer fill; this reduces the amount of seams, resulting in fewer water entry points & potential forming of cold spots on this key area of wear. Designed with a bit of extra space to allow you to throw this on over other layers (M.E.’s Mountain Fit) is what makes this jacket perfect for use in cold conditions. 2014 autumn/winter updates DRILITE Loft II outer; totally windproof & highly water resistant Prima Loft GOLD insulation (100g body and 60g arms/hood) Mountain HC insulated hood with wired visor Mountain fit with articulated & pre-shaped sleeves Shoulder Shield construction DRILITE Loft II inner hem & hood lining Carry over features 2-way YKK moulded centre front zip with insulated rear baffle 2 zipped hand warmer pockets with microfleece lining Napoleon chest pocket Internal zipped security pocket Adjustable 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. Drilite Loft II Prima Loft Gold (Formerly known as Prima Loft One) Mountain Fit Dual Tether Hem Drawcords Most people are scared to wash their outdoor jackets but like all equipment it does need to be maintained. It is actually really easy! Feel free to give the shop a call from 09:00 until 17:30 Monday to Saturday (19:30 on a Wednesday), as we are always happy to help & give friendly advice. Or if you are reading this outside our normal opening hours here is a useful link to Trekitts recommended product for washing & caring for kit. Nikwax Tech Wash