We only use high quality cotton material for this product, and we run tests to make sure that our cover fits well to the Pello type of chair covers. We also test for shrinkage due to washing to make sure the covers fit well even after washes. The package includes replacement chair cover compatible for ikea chair slipcover only. This package doesn’t include chair. Warning: the covers are design as Pello Chair Cover (or Pello Armchair Cover), not for Poang chair. Please do not buy this product for poang chair!