If you’re looking for style and comfort, the Birkenstock Bostons are exactly what you need. A narrow width version of the iconic mule, they're designed for an easygoing look and feature the famous Birkenstock moulded footbed to provide stability and support while you go about your day. It’s no surprise that everyone wants a pair... Synthetic Felt Uppers, Narrow Width, Moulded Cork Footbed, Adjustable Leather Strap, EVA Outsole, Made in Germany. Birkenstock Boston Clog - Black Authentic Felt, Size UK 10.5 | END. Clothing