Mesh and mountains

[alanmcorcoran]

Plan on doing some riding in hot weather coming up in a week and I've heard many on here sing the praises of "mesh" jackets. In California, especially in the mountains and "high Desert" it's common for temperatures to be in the high 90's during the day and then drop to the fifties at night. I'm wondering - can one get away with "just" a mesh jacket if one plans on riding at night? Also, temperatures can be a lot cooler (sometimes downright cold) near the ocean and hotter than hell ten miles inland. Right now I have an ICON motorhead leather armored jacket (with a zip out liner) that I am happy with, but it does get hot. I don't take the liner with in the summer - just add layers if it gets cool. But it's not so good in the heat.