I loved these, all you need with it is a pair of socks. You can even add a pair of leg warmers too if you like.
Leg WarmersHere is a great tutorial on making your own: http://www.cutoutandkeep.net/projects/baby_leg_warmers_aka_baby_legs
You can make these yourself or order them custom made for the same price as a diaper cover! Wool is amazing - you can use it as a diaper cover, or on its own when making the transition to diaper free. They can be used as a cover (dried between each wetting) until they start to smell. I've never actually waited that long to clean mine, I usually let them be used around 5 times. I do think lanolizing is pretty darn neat, it aids a lot with wicking! It is especially great when you get a scented lanolin like blueberry. :)