Prince Lionheart Warmies are made from Bamboo, which is the fastest growing plant on earth. 100% Natural: no dyes or bleaches. This highly renewable resource if fully biodegradable and naturally anti-microbial, making Warmies more environmentally friendly than disposable wipes. Babies love the ultra soft texture of Warmies, whilst parents love the absorbency. Warmies are the more responsible way to wash, and perfect for all of babies delicate needs. Approx. size – 7. 5″ x 7. 25″ (19cm x 18. 4cm) Please allow 4-6 hours for all Warmies to warm through prior to first use.