Just so that you know, the AR in the Theta AR stands for all-round, which pretty much means it is suitable for just about every mountain activity. The brilliant Gore-Tex Pro fabric has put Gore-Tex firmly back at the top of the performance tree; it is lighter, more flexible & an amazing 28% more breathable than its predecessor. Couple this brilliant new fabric with a design perfected for mountain activities & you may well have the best mountain jacket in the world! Use it as your general mountain shell as it is fully waterproof & highly breathable. Or for all of you who love a bit of alpine winter fun; it sheds snow just as well as it sheds water, its breathable, light weight & durable. Pop it in you pack & bring out it when needed. Going into more detail; the Theta AR Jacket is made from two different types of Nylon faced Gore-Tex Pro, N40r-X and N80p-X. Arcteryx have used the light & supple N40r-X nylon rip-stop fabric throughout the body to maximise comfort & breathability, this is then reinforced by N80p-X plain weave nylon on the shoulders, arms, seat & hips to protect these critical areas from abrasion. The Theta AR has a mid-thigh length to provide extra cover making it the perfect all-rounder for outdoor activities. All seams are taped to an exceptionally high standard & drawcords use a one-hand operation. The helmet compatible Drop Hood, which as the name suggests, drops down flat out of the way when not required & features a high integrated collar that forms a weather tight closure when required. Pit zips enhance breathability when you are working very hard & all the main zip is a Water Tight Vislon zip, the first zip to pass the Gore-Tex extreme wet weather test. All other zips are Water Tight zips but be aware that this doesnt make the pocket waterproof only highly water resistant, so electronics & valuables should always be kept inside a a water proof bag. The over all fit is athletic with e 3D patterning to allow full freedom of movement with minimal restriction & the Theta AR is cut longer for better overall protection. Waterproof Snow-shedding Windproof Breathable Lightweight Durable DWR finish (Durable Water Repellent) helps repel water from fabric surface Micro-seam allowance (1.6 mm) reduces bulk & weight Taped seams for added weatherproofness One-hand adjustable drawcords Waist & hem drawcords Anatomical shaping for fit & comfort Gender specific patterning Articulated elbows e 3D Ergonomic 3-Dimensional patterning for enhanced comfort & mobility No-lift gusseted underarms Athletic fit for a slimmer more flattering profile Laminated brim Glove-friendly hood adjusters Helmet compatible Drop Hood Laminated chin guard Water Tight external zippers Pit zippers for easy venting Corded zipper-pulls reduce noise & are easy to grab Water Tight Vislon front zip Zipper garages to protect zipper closure from snow & rain Laminated die-cut Velcro cuff adjusters with elastic Full seat coverage Sleeve pocket with Water Tight zip Internal chest pocket with laminated zip Two high-volume hand pockets Reinforced shoulders, arms & hips