SnugStop The Original Bed Wedge Mattress Filler, Bed Wedge Pillow, Bed Headboard Pillow Wedge, Gap Filler Between Your Headboard and Mattress, Triangle Pillow Wedge, Don't Lose Your Pillow (King)

Good

It solved the problem immediately for my daughter’s bed It fit perfect and stayed in place I did wash and dry it before using it and the side pocket buttons tangled up but i didn’t need those I recommend unbuttoning before washing

Not sure how I managed without this. No more pillows behind bed. This good stuff in place. However if you lean on it it can push down if you have large gap. Just heads up on that. However, pillows won’t side down so definitely a plus.

this thing is so awesomeI have a slight gap at head and footboard of bedkept loosing pillows and this is an absoulte savior

This is nice but bigger than I expected. It does the job. I just wanted something a bit smaller.

I didn't think wedges even existed! I used to just shove pillows down there so this is a great invention! I'm going to order more for every bed in my house!