Purflo jersey sleepsac features 100 cotton jersey outer 100 bamboo dream lining44 is soft and silky against babies skin environmentally friendly bamboo fabric is 60 more absorbent than cotton amp has natural anti bacterial properties hypoallergenic amicor pure filling44 prevents the build up of bacteria and dispels dust mites that are linked to asthma and eczema includes zip on long sleeves for colder nights integrated scratch mitts to protect against scratching and