I purchased this Sunshade for the Y on Amazon, it has 2 separate layers with the silver layer facing the top and a black layer facing the inside, so 2 sunshades together, man this makes a world of difference, took a ride to the beach and I felt no heat beating down on my head, back or shoulders, that’s with the windows closed and once at the beach I cracked open the 4 windows About an inch to let some cool sea air in, didn’t have to turn the A/C on at all. Then on the way back home I turned the A/C on and set it to 70 as I didn’t need it any colder then that. I monitored the Cabin air on the App and it maintained at 70 with no issues as there was no heat to battle. I have a different sunshade on my Model 3 but I’m going to look for this same one for the model 3 because this one works way better at stopping the heat.
Also note that you get a big windshield cover with the silver back and it has a Velcro wrap that attaches around the rear view mirror, also great for camping at night.
No rear hatch window sunshade, it doesn’t need it.
Mixsuper Windshield Sunshade...
https://www.amazon.com/dp/B08CRC4Q6G?ref=ppx_pop_mob_ap_share
Fred