Asatdd Bed Bridge Twin Size to King Size Bed, Waterproof Bed Split Filler, Twin Size to King Size Bed Converter, 75" x 12"

Perfect

for the price this thing does the job. It doesn’t really scrape your skin, but there is a bit of an edge to it, but it’s necessary. I just bought a XL flat sheet and wrapped it around this and tucked it in the between the mattresses. It works pretty well and and when I put my comforter over it, you can’t even tell there’s a gap. It looks like a king bed, just like I wanted.

Absolutely love this it has made a huge difference 👏

Great, gets rid of gap

It took a while for it to stay flat, but I put some weight at each end and after just a few hours it was fine. The filler is not noticeable when a mattress pad is placed over it. It's nice not to have that gap.

This item does not do a great job as a filler for two beds together

Although it did cover the gap between the beds, it still left a bump in the middle. I will have to replace the mattress with a larger one

It’s fit perfect between the mattress. It’s softness and stability is good.