muk·luk 
(mŭklŭk′)
(mŭklŭk′)n.
1. A soft boot made of reindeer skin or sealskin and worn by Eskimos.
2. A slipper with a soft sole resembling this boot.
[Yupik maklak, bearded seal (from whose skin the soles of mukluks have traditionally been made).]