Patent ID: 8523266

Claim:
A side fastening assembly for a flexible tonneau cover system of a pick-up truck, comprising: a first fastener sewn on an elongated slat by two sewing threads, wherein the elongated slat is slidably inserted in a channel portion of a side rail mounted on a side wall of a cargo bed of the pick-up truck, and each of the two sewing threads has an exposed sewing portion being discontinuously arranged at a single line close to a fastening region of the first fastener and projected from an inner surface of the elongated slat to be in contact with a bottom surface of the channel portion, wherein the exposed sewing portions reduce the contact area between the inner surface of the elongated slat and the bottom surface of the channel portion of the side rail; and a second fastener sewn on a flexible cover material of a flexible cover assembly, wherein the first fastener and the second fastener are engaged with each other in a case that the flexible cover material is unrolled rearward on the side rail to cover the cargo bed.