Fromyak +‎skin.

yakskin (countable anduncountable,pluralyakskins)

1. Thepelt orhide of ayak;leather made from yak hides.
   • 1933,James Hilton, chapter 3, inLost Horizon‎^[1], New York: Pocket Books, published1939, page59:

     […] there was greater ease in avoiding a scene since wine and fruit were now on offer, having been unpacked by the marching party, stocky Tibetans in sheepskins, fur hats, andyakskin boots.

   • 1996,Simon Winchester, chapter 14, inThe River at the Center of the World‎^[2], New York: Picador, page379:

     Down on the banks men were offering ferry rides to the far side incoracles made ofyakskin.

   • 2010,David Abrams,Becoming Animal: An Earthly Cosmology, New York: Vintage, published2011,pages202–203:

     We accepted the invitation to stay at the home of the shaman’s parents, sleeping underyak skins on the second floor with the rest of the family[…]

• yak-skin,yak skin