/ˌpɑːliˈestər/
poly·es·ter
BrE /ˌpɒliˈestə(r)/
NAmE /ˌpɑːliˈestər/,
/ˈpɑːliestər/
[U]
a strong material made of fibres (called polyesters) which are produced by chemical processes, often mixed with other materials and used especially for making clothes
a cotton and polyester shirt