Wife and I both wear Spidi vests which are just rebranded Hit-air ST's. The ST comes with a nonremovable back protector, so as long as we're using the vests we lighten up a bit and leave out the back protectors in our jackets. We tried on the Dianese vests but decided against them because I think in south Texas they're going to be too hot, so same with the Tech-air. At least with the Spidi's you can wear mesh and get some ventilation going. We also had the older model Spidi's which were the rebranded Hit-air VHR's I think. No back protector, and more open then the new ones so a bit cooler in the summer. Best deal is at motodracing.com - about $100 cheaper than Revzilla if I remember correctly, and a bit cheaper than from Hit-air.