Probably polyester. Same thing most umbrellas are made of.
Here’s what I found online: hope it helps, What is Proposition 65?Proposition 65 requires businesses to provide warnings to Californians about significant exposures tochemicals that cause cancer, birth defects or other reproductive harm. These chemicals can be in theproducts that Californians purchase, in their homes or workplaces, or that are released into theenvironment. By requiring that this information be provided, Proposition 65 enables Californians tomake informed decisions about their exposures to these chemicals.Proposition 65 also prohibits California businesses from knowingly discharging significant amounts oflisted chemicals into sources of drinking water.Proposition 65 requires California to publish a list of chemicals known to cause cancer, birth defects orother reproductive harm. This list, which must be updated at least once a year, has grown to includeapproximately 900 chemicals since it was first published in 1987.• What types of chemicals are on the Proposition 65 list?The list contains a wide range of naturally occurring and synthetic chemicals that include additives oringredients in pesticides, common household products, food, drugs, dyes, or solvents. Listedchemicals may also be used in manufacturing and construction, or they may be byproducts of chemicalprocesses, such as motor vehicle exhaust.• What does a warning mean?If a warning is placed on a product label or posted or distributed at a workplace, a business, or in rentalhousing, the business issuing the warning is aware or believes that it is exposing individuals to one ormore listed chemicals.By law, a warning must be given for listed chemicals unless the exposure is low enough to pose nosignificant risk of cancer or is significantly below levels observed to cause birth defects or otherreproductive harm.• Where can I get more information on Proposition 65?If you have specific questions on the administration or implementation of Proposition 65, you cancontact OEHHA's Proposition 65 program at P65.Questions@oehha.ca.gov, or by phone at (916) 445-6900.
I got it picked up from store