Each [Knothide Leather] is craftable from 5 [Knothide Leather Scraps], so a leatherworker can make 1 [Heavy Knothide Leather] from 25 [Knothide Leather Scraps]. The requisite number of Knothide Leather Scraps may sometimes be bought from the auction house and crafted into Heavy Knothide Leather at a lower cost than buying the Heavy Knothide Leather by itself.