@Vonda Z can you wash the uHaul furniture pads?
Vonda Z has actually created an amazing resource for everyone through her
website. As someone with zero sewing experience, I've found her hammock and liner tutorials to amazingly helpful.
She discusses using the UHaul pads in
this post and also in
this post. She shows the layout for maximizing the use of the UHaul pad in
this post.If you want to make these "mat" style liners, it's really important to pre-wash both the UHaul pad and the fleece in hot water. Being that the UHaul pads are cotton and fleece is synthetic, they will shrink differently in hot water. It's good to make sure they're pre-shrunk before sewing them together.
Also, I noticed when I pre-washed the UHaul pad, it shed a lot. A lot. The lint screen on the washer's drain pipe had fallen off and the excess lint almost clogged the drain. Because of this, I made my cage liner mats with the UHaul pad sandwiched between two pieces of fleece to hopefully trap any loose lint in the future. I don't know if this was a waste of fleece but it's nice that they're double sided
You can still use the UHaul pads as an absorbent layer even if you're not sewing the mat style liners. If you prefer to wrap your plastic pans with the fleece and hold it in place with binder clips, it would be really easy to just cut a piece of the UHaul pad the size of the inside of the pan to go under the fleece. The UHaul pads are too thick to wrap around and binder clip.