Silk kills the silkworms. It would be ridiculous to be okay with silk, which requires animals to die, and not be okay with wool. Sheep overheat and die in the summer if they haven't been sheared. We've had a symbiotic relationship for a long time- us getting wool is necessary for the sheep's survival. Hard to get more animal friendly than that. If he insists on plant fibers, cotton or linen. Neither would really be entirely appropriate in a highly formal situation.
3/17/14 at 2:04pm