Cosmo Beds from Bed SOS the UK’s leading stockists of Cosmo Beds. The Birlea Cosmo Beds range consists of a stylish collection of modern silver midi sleeper bunk beds. The Cosmo metal beds are available in single size. The Cosmo bed range will bring a modern style to any child’s bedroom. All of our Cosmo Beds are available for free UK delivery. The Cosmo bed also comes with one year manufacturer’s warranty.