The cocoonbaby protective cover protects and extends the life of your cocoonbaby thanks its perlam fabric technology the protective sheet is both highly waterproof and breathable this allows it to repel and liquids and protect the cocoonbaby underneath the breathable fabric also prevents your baby getting to hot at night and helps to keep them cool to prevent overheating the sheet fits the cocoonbaby easily by slipping over the top using its elasticated rim and can easily be machine washed