This is a great looking jacket made using Pertex Shield 3+ which is a hydrophyllic PU membrane that is very breathable. It feels soft and flexible yet is durable and easy to wear. One of the great features of this jacket is the YKK Aquaguard escape Artist zips! These underarm vent zips are so long you can get your arm completely through them for a real cool off and are two way so you can regulate how much fresh air you want at any time. The Firewall has a helmet compatible hood with volume adjuster and wired peak with tethered draw cords which are much safer in breezy conditions! This jacket has roomy harness friendly pockets with YKK Aquaguard zips, Velcro adjusting cuffs and hem draw cord to keep the heat in. Designed in a regular fit with a good back length for extra coverage. For all year round hill walking, climbing and backpacking, this is an excellent outer shell with great styling too.