If lightweight and warmth is your concern, the Microlight Alpine Jacket from Rab is the perfect choice. The 750-fill down allows for extreme compressibility and weight savings, coming in at 470 grams; youA&&';;ll be happy to pull this out to pair with a hard shell in wet weather, or just to hang out at the end of a cooler day spent in the outdoors. Micro stitch-through baffle construction Adjustable hood with laminated brim and flexible polymer peak Diverted hood baffle lines for anatomical fit Stuff sack Slim fit RAB Women&';s Apparel RAB Size US Numeric Size Chest