Very breathable. The solid latex pillows typically have lots of perforations for air circulation. I just got two of these pillows from Brooklyn Bedding, and I didn’t know a pillow could make me so happy:

https://brooklynbedding.com/products/talalay-latex-pillow

It feels like the perfect combination of supportive and soft. I’ve had a latex mattress for several years and absolutely love it, so I figured I’d also like a latex pillow. I haven’t tried washing them yet, but they come with an organic cotton cover that’s washable. They recommend spot cleaning the latex inserts.

It's very cool!

You might even have free 'fix-it clinics' in your area--our county sponsors monthly Saturday times when you can bring anything that needs repairing to a room full of volunteers who love fixing things. Such a joy to see all these engineers, mechanics, electricians, sewers, and craftspersons who love to help.

I remember their customer service being really helpful about what kind of mattress to get--you might contact them and mention your concerns.

She loves it. It’s the same material as the firmer latex; just a different density.

My friend had the same issue and ended up getting a soft topper from them. That might help you.