GoPro Genuine Chest Harness, Head Strap - 3 Piece Set

This is a 3-piece set including one each of GoPro genuine chest harnesses (large and medium) and one head strap.
I haven't used them much since purchasing, so I believe they are in very good condition.
I don't think there is any stretching of the straps.
Additionally, I plan to list clips, a hat clip, and GoPro Hero 4 and Hero 7. I would be grateful if you would take a look at them as well.