This thermal has extended my riding season by months. I hate bulky clothing on a bike, but when the weather dips to 30 layers are key. This is a great top/2nd layer depending on if there is rain/drizzle. I ordered it a size up know that it would likely be over layers. I am 5'11", 200 pounds with a 35" waist. I wear a L in PI jerseys, ordered this in XL.