Cotton / Polyester blend
White: https://www.bigw.com.au/product/tontine-1200-thread-count-pr…
Dark Pewter: https://www.bigw.com.au/product/tontine-1200-thread-count-pr…
Soft Jade: https://www.bigw.com.au/product/tontine-1200-thread-count-pr…
Grey: https://www.bigw.com.au/product/tontine-1200-thread-count-pr…
You'd really want to know the percentage of polyester before buying.
Given they don't state it, one can only assume it's got a high poly percentage .