Andermatt Anthracite Shearling is new in the range of Birkenstock slippers.  Keep your feet cozy in a shearling footbed. These anthracite comfortable slippers with raised shaft are also available in light gray and with standard footbed.
The slippers have a removable, anatomically shaped cork-latex footbed, so they are easily replaced by your own orthotics.

Although Birkenstocks size large, you probably need your usual shoe size for slippers with shearling footbed.