Distinguished SOTW Member, Forum Contributor 2015-
It acts as insulation. Unless the horn is producing heat, it will be cooler on a hot day inside the insulated volume.
You're welcome. I used to have a Cavallaro cover on the Walt Johnson case for my Serie III tenor. Living in New Mexico, I found that it made a positive difference year 'round - my horn didn't get as hot in the summer, nor as cold in the winter. I really like it for that, the additional shock protection, bonus storage space, and good looks.Great. Thanks for the answer. I just have difficulty understanding the effects of the lamb wool... for cooling.... lol