Mountain Equipment Impellor Shakedry Jacket

Backcountry.com says:
The Impellor Shakedry Jacket is the lightest, most packable rain shell from Mountain Equipment, and it's more than suitable for minimalist-minded backpackers and rainy day hikers. Gore-Tex gives rugged waterproofing and comfy breathability, and Shakedry beads moisture on the fabric so you can literally shake it dry. Mountain Equipment included a stuff sack for compact packing, and you can clip the sack to the outside of full packs.