Tesla's Seat Up All-Weather Rear Cargo Mat

[Yinn]

I'm trying to figure out if this will fit inside the well too, or if it can only be used on top of the cover behind the third row.
Does anyone have this mat? Tesla — Model X All-Weather Rear Cargo Mat - Third Row Seat Up

 

[McManX]

I have it. I haven't tried it in the well but I highly doubt it would fit down there because of the awkward shape of the bottom of the well. Also I believe the well is significantly narrower than the mat.

 

[vandacca]

I have used this cover in both positions (level with back seats, and the lower position) and it fits fine in both of those positions. You just need to be careful when lowering/raising the 3rd row seats because it gets caught on the mat lip.

If I get a chance, I'll empty my trunk well and see if it fits, but my guess is that it won't. If I recall correctly, the bottom of the trunk well isn't flat and has raised portions, so I don't think it could lie flat in the the trunk well.

--Update--
Looks like it definitely won't fit into the bottom of the trunk well. The trunk cover (in the lower position) sits on ledges on both sides. Below this level the trunk well gets significantly smaller, so the mat will not fit properly below these ledges.