I wore the Troy Lee Designs 7855-HW Long Sleeve Protective Shirt before purchasing the Leatt Airfit Lite. They are both solid under jersey potection. The Leatt is much easy to get on and off with the zipper. The chest padding is more extensive on the Troy Lee, more specifically there are pads that go up to your clavicle. I would still be running the Troy Lee but the ER had to cut it off so I decieded to try something new. I've yet to take a spill in this thing but it feels like it will be about the same protection wise, minus a bit less pad on the chest. The Leatt is also a bit bulkier, just by a hair though. My jersey fits a bit tighter over it. Probably going to bump up a size for the 2015 riding gear. The Leatt also feels like it will run cooler. I don't know this for sure but the fabric is different and on hot days the Troy Lee got REALLY hot. Overall I am pleased with it and look forward to getting out there! Both are a under jersey armors are a good choice.