The beautiful purflo sleepsacs have a unique combination of features zip off removable sleeves soft fabric zip guards to prevent zips scratching babies soft skin zip open front for easy night changing natural bamboo lining absorbs 60 more moisture than cotton and dries 20 faster than cotton bamboo is naturally anti bacterial so their are no nasty chemicals next to babies skin and it beautifully soft amp silky anti allergenic anti bacterial filling that helps to prevent