Celebrity Style: Keira Knightley in Birkenstock 1 Reply Keira keeps it casual in the Birkenstock Boston Suede Clogs. We’re digging her earthy color palette, but the jury’s still out on the tights/clogs combo. What do you think? Are tights + clogs a fashion Do or Don’t? Source: coolspotters.com Share and Enjoy Last updated by Shoes at February 6, 2012.