What Marmot say:
The winner of several prestigious design awards, it couldn't be any lighter and still be called a jacket. Supremely detailed and pro-minded, The Mica is made for traveling light in tough conditions. The Mica is 100% seam taped, waterproof, and highly breathable, thanks to MemBrain® Strata™ fabric. It also features an attached adjustable hood and Velcro® cuffs, a water resistant front zipper, and it packs neatly into its own pocket.
See this product at the Joe Brown - Snowdonia shop