The bamboo nappy is a one size snap fitted that is super soft and made of bamboo. Since it is a fitted it does need a cover. It comes with 2 boosters and runs about $20.
Dirty Diaper Laundry gave Little Comfort Nappies a great review:
http://dirtydiaperlaundry.com/little-comfort-fitted-review/
You can purchase the diapers from Otter Babies:
http://www.otterblotters.com/i_94/One-Size-Bamboo-Fitted-Diapers.htm
The Dirty Diaper Laundry and Otter Babies is hosting a giveaway that will be open until Sept. 27.
http://dirtydiaperlaundry.com/little-comfort-giveaway-sponsored-by-otter-babies-927/
Check it out and good luck!