Exactly what I was looking for! I am a long distance runner and needed a running jacket that is very light and waterproof yet breathable. I have a different style Columbia rain jacket already but wanted one that was even lighter and more minimalist yet still water-proof. This jacket is very light weight, packs up small, has adjustable hood (both an adjustable elastic drawstring and a velcro tab on the back).  5'3", 120 lb and size Small is perfect. Loose enough to wear over layers, roomy enough in hips and sleeves. Nice high neck that snugs up tight. Perfect!