They are all right, but fairly lightweight, so they are rather flimsy when trying to remove from the crockpot with a chicken or soup inside. I wrote on the outside of the box in black sharpie "Add Water" because the second time I used one, forgot to put water in the bottom of the pot and the bag melted.
These liners are great! Loved that they work so well, just make your roast or chicken or stew in the bag that has been put in the crock pot, REMEMBER the most important part is to put water between the bag and your crock pot. Read the directions on the box. If you decide to make some thing that is cooking overnight, such as I made a stew and wanted it to cook for hours. It is important to keep the water between the bag and crock pot. I added a little water, but not enough. By the morning the bag was stuck to the pot. Next time I used it, I made sure the water was kept between the bag and crock pot and when I was done I took the bag with the food in it out of the crock pit and no clean up of the crock pot needed at all. Yippee!