Birkenstock 1014938 Zermatt Anthracite Wool Felt Slippers. These lovely slippers from Birkenstock have a removable footbed that allows you to use your own insoles and these slippers have wool felt upper material.
Colour: Anthracite/Dark Grey
Material: Wool felt
Insole: Suede, flexible leather lining that is gentle on the skin
Footbed: Removable footbed, cork, anatomically shaped cork latex footbed
Please see link to Birkenstock size guide: Birkenstock Size Guide