mfpen Event Derby Shoe in Black Crustmfpen Event Derby Shoe. Buffed leather derbys. Cow Lining, Cow Insole Square Toe, Lace Up Closure Buffed Leather and Suede Lining Stacked block heel with rubber injection Handcrafted leather sole with rubber injection Made in Portugal Style ID: CFM 002 mfpen mfpen is a contemporary clothing brand based in Copenhagen, reimagining Scandinavian minimalism and rethinking traditional designs with relaxed silhouettes and responsible production methods.