VEVOR Back Seat Extender, Dog Car Seat Cover for Back Seat Bed with Mesh Window and Storage Pocket, Supports 400lbs Dog Hammock for Car Dog Car Bed 57.4"x30.3" for Truck

While the product description doesn't mention anything about anxiety, customers generally have positive things to say about this product. One review mentions that it is well made and fits the back seat area nicely.

According to the product description, it is easy to install with no special tools required.

I did not find any reviews mentioning whether the product blocks access to rear storage. The product description does not provide information about this.

The product description states it is washable and made of durable, waterproof, and scratch-resistant fabric. Customers agree that it is easy to clean.

The base is pretty sturdy. Our dog is just under 50lbs, and there’s no sagging in the front portion where the seat doesn’t extend. It does fold in three places to make it easy to store, so it may try to fold up on itself if your dog is very heavy and/or it’s not tightly secured to the headrests, and definitely use the seat anchors.

Absolutely! I have captains chairs in my pictures. I have this in a mini-van with captains chairs.