The Women s Andreson Hybrid Jacket from Regatta is a zip through jacket engineered to keep your core insulated while allowing full mobility in the mountains The main body uses Warmloft technology - the ultra-fine synthetic balls provide outstanding warmth with the added benefit of breathability The arms side panels and hood are made with Extol Stretch fabric for unrestricted movement Combining wind and shower protection with an exceptionally low pack weight it s a great choice when you are heading out in changeable weather conditions or for longer journeys and trips It also doubles up as a super warming mid-layer on really cold days