Abstract: An optical fiber protective unit includes: a reticulated tube; and a tubular member that is inserted through the reticulated tube and that is configured to accommodate a plurality of optical fibers. The reticulated tube is disposed on an outer periphery of the tubular member in a state folded in a longitudinal direction. Both end parts of the reticulated tube are located on the outer periphery of the tubular member.

Abstract: A vehicle seat including: a rotatable arm configured to release a holding state of a holding mechanism of a seat body; and an operating strap configured to rotate the arm by being pulled at a first end portion thereof, wherein a second end portion of the operating strap opposite to the first end portion is fixed to the seat body, a middle portion of the operating strap is folded back and is hanged to an engaging portion provided to the arm, and the arm is configured to be rotated by pulling the operating strap so as to pull in the engaging portion by the middle portion, and wherein the middle portion, which is folded back from the second end portion, is folded back from an outer side to an inner side with respect to a rotational center of the arm.