DANSKO. 9421-871600. BERRY. MUSHROOM BURNISHED NUBUCK. Berry is a mule that can be worn two ways as a classic mule or by simply moving the swivel strap to the back it adds the benefit of an adjustable ankle strap. This style features our patent pending stapled construction linings with Aegis Microbe Shield for odor control Nubuck uppers treated with 3M Scotchgard protector for stain resistance and a lightweight patent pending EVA outsole for long-lasting wear.