Sheepskin yog daim tawv nqaij ntawm tshis los yog yaj ntawm tsev neeg Bovidae. tshis los yog yaj daim tawv nqaij muaj dej, protein, rog thiab inorganic tshuaj, ob lub ntsiab lus tom kawg yog tsawg heev, cov protein extract ntawm lub epidermis txheej yog tsuas yog keratin; Dermis, feem ntau. collagen thiab net hard protein, ntxiv rau tseem muaj elastic tawv protein, albumin, globulin thiab mucin.