Let me tell you about these Reynolds slow cooker liners - they're absolute lifesavers for anyone who uses their crockpot regularly! Each box comes with 4 liners that fit 3-8 quart round and oval slow cookers perfectly. The cleanup promise is no joke - they guarantee cleanup in 8 seconds or less, and they're not exaggerating. You just lift the liner out after cooking, and your slow cooker is basically clean already. No more soaking and scrubbing stuck-on food for what feels like hours! The liners are BPA-free and made from a heat-resistant nylon blend that can handle temperatures up to 400°F, so they're safe for low, medium, and high settings. They're FDA-compliant and food-safe too, which gives you peace of mind. Whether you're making chili, pulled pork, pot roast, soups, or any other slow-cooked meal, these liners make the whole process so much more enjoyable because you know the cleanup will be quick and easy. The 13x21 inch size is just right for most standard slow cookers. Seriously, if you hate cleaning your crockpot as much as I do, these liners are worth every penny. They let you spend more time enjoying your meal with family and less time scrubbing pots - and who doesn't want that?