Alva Baby Australia. Your home of Alva Baby brand modern cloth nappies. Choose from adjustable newborn and prem nappies, one size fits most with velcro closure and one size fits most with snap closure, as well as double gusset nappy covers. With Australia's largest range of Alva Baby prints and colours, you're sure to find what you are looking for. We also have all the necessary extras and accessories, such as, nappy inserts and boosters, small and medium wet bags and nappy liners.