[StellaSquash]

I'm sure what it's called but the mat we got from TSC was VERY heavy, and it's about an inch thick. it comes in a precut size and we had to cut it down ourselves. even the cut size was difficult for me to carry.

it looks similar to the mat in your first link. definitely worth it though, I just toss a bed on top and she's set. certainly cuts down on the noise in the crate too.

 

[StellaSquash]

it fits perfectly in the tray, thickness wise. I had him cut it to fit in the tray just for ease of moving it for when i want to clean the crate. when I need to vacuum, I just slide the tray out. I can move the whole thing, but it's easy to slide the tray out and then lift the crate.

the other day I slid the tray out, lifted out the mat and cleaned the tray, plopped the mat back in and slid it back into the crate.