This is the Bistro Pro, with a little extra. Material Croslite is a closed cell material which means it won't absorb and liquids, so if you spill anything on them, if you sweat in them, if you take them in the water, they won't break, stain, or stink! It also makes them super easy to clean! Shape The uppers are completely sealed so if anything spills on you, your toes will stay dry! Design These clogs are made from one mould which means that the upper won't separate from the soles and deem the shoes useless! The strap on the back pivots to make these slip on, or hold your heel for support. It's also adjustable with Velcro on either sides. Fit The roomy fit gives the most room possible in a shoe and the Literide comfort makes these the most comfortable work shoe ever! Work Certified The soles have Crocs Lock slip-resistant treads which will keep you from slipping all over the place.