The Rab Womens Microlight Alpine Jacket is insulated with 130g /5oz (size UK 12) of 750 fill European goose down and has a Pertex Microlight weather resistant outer fabric providing maximum warmth for minimal weight. The narrow baffle structure minimises down migration and provides optimum loft ensuring efficient heat distribution and allowing the jacket to be compressed down and stowed inside the chest pocket for convenient transportation. Features Pertex Microlight 30D outer shellDWR coating130g (12) of 750 fill power superior quality European goose downMini stitch-through baffles stabilise position of downGrown-on down filled hood2 YKK zipped hand warmer pockets and 1 YKK zipped chest pocketYKK front zip with internal down filled baffleLycra bound hem and cuffsStuffs away into the chest pocketMedium cutBluesign approved Glossary Pertex MicrolightPertex Microlight is made from tightly woven yarns, which help to prevent excessive heat loss through the fabric, making the garment warmer without adding weight. Using 33 decitex/30 denier yarns, it is both downproof and windproof, water-repellent and durable. DWR (Durable Water Repellent)A DWR-treated fabric will bead-up water on its surface to stop it from soaking into the fibres. This maintains breathability and shortens drying times. Bluesign Companies who gear their production to the BluesignStandard guarantee the consumer that, throughout the entire manufacturing chain, only those components and processes are used which are safe for humans and the environment.