Just puttin this here from biotecharticles.com as an FYI, it's important to share all sides then let the individual decide:
Toxic Fibers and Fabrics
Rayon: Viscose or rayon is derived from cellulose of wood pulp or bamboo. Cellulose is natural starting material but it is processed by chemical treatments involving carbon disulphide, sulfuric acid, chlorine and caustic soda. Carbon disulphide is released into the environment in gaseous form alongwith other 3 hazardous chemicals. Their combined toxic effects are carried on heart, skin and nervous system. Carbon disulphide poisoning is similar to alcohol intoxication causing restlessness, unconsciousness, depression and sometimes death. Carbon disulphide is also emitted from rayon fabric. Ill health effects like nausea, vomiting, headache, chest and muscle pain and insomnia can be observed in people who wear rayon clothing regularly. Other toxicity effects are tissue necrosis, anorexia, polyneuropathy, paralysis, insomnia and Parkinson's disease. Chronic toxic effects on aquatic system, death or low growth of plants, shortened life span and reproductive effects in animals are also associated with toxicity caused by rayon factory effluents.
Toxic Fibers and Fabrics
Rayon: Viscose or rayon is derived from cellulose of wood pulp or bamboo. Cellulose is natural starting material but it is processed by chemical treatments involving carbon disulphide, sulfuric acid, chlorine and caustic soda. Carbon disulphide is released into the environment in gaseous form alongwith other 3 hazardous chemicals. Their combined toxic effects are carried on heart, skin and nervous system. Carbon disulphide poisoning is similar to alcohol intoxication causing restlessness, unconsciousness, depression and sometimes death. Carbon disulphide is also emitted from rayon fabric. Ill health effects like nausea, vomiting, headache, chest and muscle pain and insomnia can be observed in people who wear rayon clothing regularly. Other toxicity effects are tissue necrosis, anorexia, polyneuropathy, paralysis, insomnia and Parkinson's disease. Chronic toxic effects on aquatic system, death or low growth of plants, shortened life span and reproductive effects in animals are also associated with toxicity caused by rayon factory effluents.