Silk production involves boiling silkworm pupae alive inside their cocoons. The moral significance of silkworm suffering is debated, but peace silk and synthetic alternatives offer options for concerned consumers.
The ethics of silk production and silkworm welfare turn on a scientifically unresolved question: do silkworm pupae have morally significant experiences? The evidence suggests they have less capacity for suffering than vertebrates or even some other invertebrates — they are deeply metabolically reduced pupae rather than active larvae — but the question cannot be answered with certainty. For consumers who apply a precautionary approach to invertebrate welfare, peace silk and synthetic alternatives provide options that avoid the moral uncertainty of boiling pupae. For those who do not extend moral consideration to invertebrates at this developmental stage, the focus is better directed toward the more clear-cut welfare problems of vertebrate animal agriculture.