Pattern for leech-hide trousers

A laminated sheet printed with a sewing pattern for making an article of clothing.
It tells you how to make a pair of leech-hide trousers with the following components:
 2 - bunny pelts 
 10 - rock leech hides 
 3 - ice yeti pelts 
 2 - vials of cytidine 
Making this would take expertise in craft.
==Components==
*Bunny pelts
*Rock leech hides
*Ice yeti pelts
*Vials of cytidine