Outdoor Research Centrifuge Hoody - Lightweight Waterproof Windproof Hiking Jacket for Men & Women - Perfect for Camping, Backpacking & Outdoor Adventures

Wow! This is such a smart layer. It’s like a Transition hoody (think thin Patagonia R1 grid fleece) on the inside with a thin, stretchy, waterproof outer layer. I have gone jogging with this in the rain and stayed dry, both inside and out. It’s great for mountain activities like trail running, ski touring (though maybe not as your outer layer on descents in dense trees—not sure how well it would handle a sharp snag from a branch) and Nordic skiing when you only want to bring 1 layer. And the thumb loops are handy and come at a nice length. If you’re between sizes, size up on this one.