Wool works by absorbing moisture from the nappy, and letting it evaporate away. When lanolised, it does not feel wet as lanolin is a sheep's natural umbrella
and stops it getting soggy. It does not smell as bad or need washed as often as fleece, and wool is less prone to wicking or leaking than PUL wraps, they also look more comfy and don't leave red marks. Soakers can be used under pyjamas and longies/shorties etc can be used instead of normal trousers.
You can get knitted wraps from many woolly WAHMs, check out the WAHM Wonders section as there may be instock soakers or you can have one knit specially for your LO. You can also get Disana wool wraps http://www.twinkleontheweb.co.uk/acatal ... Wraps.html
or wool interlock soakers, which are fab but seem to be quite difficult to come by these days.
Buying a preloved one from the classifieds is a cheap way to try woollies, and as a bonus they are often well lanolised with use and very effective. You will need to buy lanolin (or use lansinoh if you have some in the house) to lanolise the soaker every so often and you'll find info on how to do this on the wool board.