Lobster claws is where it's at if you are dealing with below freezing temps.
http://www.mec.ca/Products/product_d...=1259277826311
A little expensive at $99, but if your dealing with sub freezing you will want them.
http://www.coloradocyclist.com/product/item/LOUXTRZK
A little cheaper at $70, but not waterproof if that's a big deal