These inner sleeves fit tightly around the card to give it an extra layer of protection. PRO-Fit sleeves can also be used as a standalone sleeve to showcase the full art of the card. The standard sized PRO-Fit sleeves can be used in conjunction with the Ultra PRO 35pt ONE-Touch magnetic holder, especially recommended if the card is expected to be taken in and out of the holder frequently. Made from ultra clear, archival-safe and acid-free material. Do not use with sharp-angled sports cards as the tight fit may damage the corners. 100 sleeves per pack.