When unpacking, I was just taken aback, whether as a thinner and more flexible protector can ever protect in a fall. Involuntarily I have the day made the first "test" when I crashed sideways while biking and first came up with the elbow / forearm on a big rock. The impact I was able to feel the elbow, it did hardly hurt and even after days is not even a bruise to see. The impact was really hard (not due to the speed, but rather because of the ground) and I can only thousand thanks to POC say that there still so ran out! What perhaps should know the protector: he should be close to the body, because only by body heat, the material is really soft. So in winter it must under the jacket. In this respect, no buffer in the size choice for clothes schedule! Exact size table can be found on the homepage of POC. On bare skin he wears and comfortable, as the seams and the fabric is soft. Only the right / left-plate, which is sewn into the Protekor, was disturbing to me. Simply cut out and ready.