Reel-Tite is a new product developed by Scott Grady. The idea is simple and effective. The foam insert sits on top of your reel foot and provides both protection for your reel and insert and helps get a better fit when using slide band hardware. The foam is pretty thin and once in place is pretty hard to see. What you will notice is that you reel tends to move around less and in the event that your rings (or end cap) are a little big for your reel the foam does a great job filling the extra space. I used these with a few friends a few weeks ago and I was impressed with how well they worked. You can even stack them up if you have a small reel foot. The foam is non-marring so it won't damage your reel or seat.
Reel-Tite is offered in a two-pack that has both a black and a grey foam pad. If you have had issues with your reels sliding around on you give them a try!