The Atom LT Hoody is quite simply one of the best lightweight & versatile insulated jackets available; this year its been enhanced with a lighter, stretchy face fabric & re-designed hood. This fantastic jacket can replace several layers of bulky fleece with one super light & warm layer. Filled with a highly efficient synthetic Coreloft insulation it provides enough warmth for active cold weather pursuits or can be used all year round when the temperature drops. Just about everybody at Trekitt owns one of these, they are just so comfortable & practical. The new face fabric is called Tinthan and is a 100% nylon 46g/m² 20D mechanical stretch nylon rip stop with an air permeable polyurethane coating & a durable DWR (Durable Water Repellant) finish. So the upgraded Atom LT is softer, more compressible, tough & just as practical...genius! The PU coating and DWR finish make this brilliant hooded jacket highly weather resistant, keeping out all but the worst wind & rain. Polartec Hardface Powerstretch side panels provide fantastic freedom of movement & give an anatomical efficient fit whilst enhancing breathability under the arms. The Atom LT now features a re-designed fully helmet compatible hood, that goes over just about any mountaineering helmet. This is a big improvement over the old under helmet design that could be a bit bulky & uncomfortable under your lid. The Atom LT is insulated with 60g/m² Coreloft on the body, sleeves & hood, an incredibly efficient synthetic insulation that performs even when wet & will dry out exceptionally quickly. We have found through practical experience that this jacket is highly water resistant, negating the need for a shell until it really is pouring down. Featuring the usual Arcteryx gorgeousness & finishing touches including the jersey knit stretch cuffs which are just so comfortable & unobtrusive. Tinthan nylon wind & water resistant hard wearing outer shell Breathable 60 gm 2 Coreloft insulation Insulated Storm Hood fits over a helmet Polartec Powerstretch with Hardface technology side panels Articulated elbows Gusseted underarms Two zipped handwarmer pockets One internal chest pocket Jersey knit stretch cuffs Drop back hem Adjustable hem drawcord