Will VÅGSTRANDA Pocket spring mattress, medium firm/white, Queen fit in an Aiways U5 2021?

The U5 is one of the more forgiving boots to load. The opening measures 39¾″ wide by 29⅞″ tall, the floor runs 41″ with the seats up, and folding the bench takes it to 73¼″, a gain of 32¼″. Width holds at 40⅛″ at the narrowest point, so the space stays close to square. The sill sits 29⅞″ up with a ¾″ drop to the floor, near enough level to slide heavy boxes straight off the bumper. Long flat cartons suit it once the seats are down. Load those first, then pack around them.

VÅGSTRANDA ships as one box, and it is a heavy one: 65¾″ × 17¾″ × 17¼″ at 109 lb 6 oz. IKEA rolls and compresses the queen mattress, so instead of a floppy slab you get a short, dense block that two people can carry and one person will regret. The length is friendly; the weight is the problem, and the box gives you no handles. Most hatchbacks take it with the rear seats folded, and a wagon or SUV swallows it without drama. Load it last, on its side, so it slides straight out at home, and keep the wrapping sealed until the bedroom: once it expands, it never rolls back up.