As tempting as it is to don our pyjamas all day, every day, we do in fact have some sanity left in our noggins. Thankfully, though, the good folk behind the Birkenstock Boston crafted a pair of shoes that are like pyjamas for the feet – except chic as heck and societally acceptable. This year, those clever cookies are celebrating 50 years of the rad shoe, which makes it a darn good time to slip your tootsies into a new pair.