Year round essential mountain insulation 390g Weight (approx) Using weather resistant PERTEX® QUANTUM, 100% recycled 40g/m2 PrimaLoft® Silver insulation and upgraded with a lightweight nylon lining; the Prism Jacket has a climbing helmet hood and good pocket options. Buy Prism Jacket by Montane from our Mens range - Synthetic, Male, Hiking & Trekking, Insulated Jackets, SS20 Season Products, Mountaineering, Climbing - @ MONTANE LTD Montane has become synonymous with lightweight and breathable clothing and equipment. T he updated Prism Jacket is a versatile light-to-midweight synthetic insulating layer that's suited to a wide range of uses and conditions, whether worn as a midlayer or on top. While the feature set is aimed very much at climbers, I've been using it equally this summer for mountain rock days, scrambling, camping, bivvying and general hillwalking. www.montane.co.uk | £75. The Montane Prism is a lightweight synthetic gilet that still offers a good level of warmth. Fabric technology is critical to producing the best products, Montane works with the world's leading fabric suppliers such as GORE-TEX® for our waterproof jackets and POLARTEC® for our men and women's insulated jackets.These technologies engineer new cutting edge materials that push the boundaries of … It only weighs 247g in a men’s large and it packs away into its own pocket to create a small package that could double up as a pillow, so it’s an ideal campsite companion. Author: Bryn Davies.