Originally intending to be a boating shoe, Crocs have a reputation of being some of the comfiest shoes about. They're lightweight, comfortable, fashionable and functional, and have more styles than ever - no wonder people love them (including all of us)!
Started in the 'noughties', Hey Dude shoes are perfect for everyone, everywhere doing pretty much everything. They have a patented EVA sole and durable memory foam leather insole, all to mold to your footprint. They also look really really snazzy.
Starting in WW2 from making children's sandals out of scrap leather, Saltwater sandals are comfortable, cool and cuter than a litter of Labrador puppies (and they're really cute). You can wear them in the sea because of the special coating on the leather and rust proof buckles, mold to your feet, and have an A-list following (Paloma Faith, Fearne Cotton and Alexa Chung all love them). If all that doesn't sell it to you then I don't know what will.