polyisoprene
noun
poly·iso·prene ˌpä-lē-ˈī-sə-ˌprēn 
: a polymer of isoprene occurring naturally in rubber and gutta-percha and also produced synthetically
Example Sentences
Recent Examples on the Web There are other options for people with latex allergies, including polyisoprene, polyurethane, and internal condoms, according to the Cleveland Clinic. 
Zahra Barnes, SELF, 29 Dec. 2020 Polyurethane and polyisoprene [latex alternatives] also transmit body heat really well. Liza Corsillo, GQ, 1 Nov. 2017
Zahra Barnes, SELF, 29 Dec. 2020 Polyurethane and polyisoprene [latex alternatives] also transmit body heat really well. Liza Corsillo, GQ, 1 Nov. 2017 Word History
First Known Use
1935, in the meaning defined above