To say that the Houdini Jacket is lightweight is an understatement. At sub 4 oz. it is definitely one of the lightest emergency shells out there. I keep it in the bottom of my mountain bike pack on every ride, which happens to be the DAKINE Low Rider Hip Pack. That's right, it easily fits in a fanny pack. It has saved me a couple times already from some inclement fall weather, both in Colorado and Zion National Park. I cannot foresee a future ride, hike, or any adventure where I don't take the Houdini with me. I am 6'1", 190 lbs. and the large fits me perfectly. I would highly recommend this to any one, it will magically appear from the bottom of your pack when you need it most.
Feel free to contact me directly with any additional questions on the Houdini, mountain bike gear, or any Patagonia products.
Kyle L. - Expert Gearhead - firstname.lastname@example.org - 801-736-4337