Hi Jpeterham,
Welcome to the community.
You’re already doing a lot of the right things to sleep cooler, but you’re correct that the issue may stem from a combination of the Pro Breeze’s foam layers (which tend to trap heat despite Tempur-Pedic’s cooling claims) and the fact that your solid adjustable base, which one might suggest restricts airflow underneath the mattress, it is really of no consequence as a solid base is better for your mattress and support.
The bottom line is the mattress, period. The breathable accessories are very good when you have a natural fiber or latex mattress, they help maintain that positive breathable flow.
You do have a couple of options, some more budget friendly than others. The Perfectly Snug Smart Topper is at the higher end of the budget spectrum. I reviewed mine here and here.
The key to staying cool while you sleep is to prevent the heat your body gives off from being trapped and reflected back at you. Traditional memory foam mattresses, like those made with Tempur material, tend to retain heat, so instead of dissipating, the warmth gets redirected right back to you. It can feel like you’re sleeping on a heating pad or even hot coals, as the heat rises and lingers.
If you’re serious about staying cool, the best, though expensive, option is a mattress topper made with horsehair, or combinations like horsehair and wool, or horsehair and cotton. These natural materials are extremely breathable and allow heat to dissipate efficiently. A slightly less expensive, but still premium, alternative is a 3" organic wool topper. Talalay latex toppers can also help, as they retain less heat than memory foam, though they still hold some warmth. As a last resort, consider highly breathable options like a Monze or airfiber-style topper, which allow air to flow freely through and out the sides, especially when paired with low thread-count cotton sheets.
The bottom line is, the more distance you can put between yourself and memory foam, the cooler you’ll sleep. That said, some memory foam mattresses, like those from @Tempflow, do things differently. They still use Tempur-style foam, sometimes even the original high-density 5lb+ type, but they integrate a patented airflow chamber system designed to help heat escape.
Now, when you look at Tempur-Pedic’s own claims, especially on their “Breeze” line, it’s worth reading the fine print. They claim the LuxeBreeze® sleeps “up to 10 degrees cooler,” but here’s the full context:
++ LuxeBreeze® feels up to 10 degrees cooler based on the average heat index increase of TEMPUR-LuxeBreeze® compared to TEMPUR-ProAdapt® models measured over an 8-hour period. ProBreeze® feels up to 5 degrees cooler based on the average heat index increase of TEMPUR-ProBreeze® compared to TEMPUR-ProAdapt® models measured over an 8-hour period.
So technically, they’re not lying, but in my opinion, the marketing is a bit misleading.
I wish I had more positive news, but I hope this gives you some helpful direction.
All the best,
Maverick