Boosters are used to increase the absorbancy of a cloth nappy. They can be added to all types of nappy to allow them to be used overnight or for heavy wetters. It may be necessary to experiment with the number or types of boosters and a larger sized outer wrap may be necessary. They can be positioned either inside the nappy or between the nappy and outer wrap of a 2 piece system. Boosters can be made of various materials e.g. cotton, hemp, bamboo, microfibre and can be combined with fleece to become a stay dry booster. Boosters can also be used as inserts for pocket nappies either alone or combined for extra absorbancy.