What’s to say? They are sheet protectors. They protect sheets and you can see through them. They hold one sheet of paper and are clear see through on BOTH sides! They have three holes in the margin that fit a standard three-hole binder!! These are for PAPER sheets not bed sheets just sayin’.
Sheet protectors come so varied everywhere some are not so clear or too flimsy. But Staples have nice ones that are clear and hold up well in regular use.