The Phantom Jacket is one of the lightest waterproof shells available, offering stash able, barely-there protection for ultra running, mountain races, and long-distance thru-hiking. Features have been stripped back to those you really need without compromising on utility, from the handy full-length zip to the ventilated roll-away hood. The jacket packs into its hood when rainclouds clear, creating a palm-size pack size that effortlessly stashes away into your backpack or running vest, ready for a sudden shower. 7D 2.5-layer Pertex® Shield fabric feels weightless yet effortlessly deflects a downpour Optimized elbow precurve for unrestricted movement while running Versatile full zip makes it easy to throw the jacket on and pull it off as the weather changes Part-elasticated hem for improved fit Ventilated, roll-away hood doubles as an integrated storage pocket Reflective branding throughout Hood features rear venting to help reduce billowing on a windswept ridgeline Secure elasticated cuffs offer enough stretch to vent your forearms and access your sports watch Fit: Slim Weight: 116.5g / 4.1oz (Size M) Centre back length (Size M): 73.5cm / 28.9in Hydrostatic head: 20,000mm Breathability (MVTR): 20,000g/m²/24 hrs Main fabric: 7D Pertex® Shield 2.5-Layer construction waterproof technology with fluorocarbon-free DWR (51gsm) HH: 20,000mm/MVTR: 20,000 g/m2/24hrs