I always have 2 helmets, too, although for a different reason: I am a huge head sweater. I ruin helmets quicker than anyone I know. DH buys extra pieces of the padding, which deteriorate from sweat for some of the ones I've had and extends the life. But, the one I got about 6 months after I got my Silque is trashed, and the helmet is about 3 years old. I can only wear Bell helmets, so DH found one and ordered it while we were flying home yesterday. It has MIPS and lots of vents. My other helmet is holding up well, and is a bit older, but gets worn less. It also has relpaceable pads.
I looked at the 3 other women who came on my trip. They all had longer hair than me. When they stopped riding, they just took their helmets off and their hair was perfect. Dry and not looking like they had just come out of a rainstorm. Not only is my head and hair soaked through, I am always soaked right through my jersey and have loads of salt matted around my face.