The Good: not bulky or hot
The Bad: not that great of protection
This sub gear shirt does a good job of adding a little extra protection, mostly for the shoulders, without getting too hot or cumbersome.
Notes about the fit:while it does loosen up over time the fit out of the box is rather tight. I guess that's just part of how compression gear works and how protection in general fits, but it takes a little getting used to if you are accustomed to riding in a loose t-shirt or jersey.
I really like the idea of having some protection for the chest and shoulders that fits nicely under a jersey and that doesn't restrict movement but I hope that future iterations of this product will take the next step and offer a bit more protection (slightly thicker padding) plus add sections for the lower chest and ribs while still keeping a slim package to tuck under your regular riding jersey.