OMM's women's Sonic Jacket is truly ultralight yet will provide a remarkable level of protection from wind and light rain. Thumb loops, front zip and cinch-able hem.
The perfect superlightweight and extremely breathable windshirt that you can carry in your pocket just in case you need some weather protection whilst out on your adventure.
The PointZero fabric is windproof it also has a DWR repellancy to the fabrics surface making the windshirt water repellant and more stain resistant. Folds up into its own collar.