These are wall-mounted, foldable drying racks commonly used for socks, underwear, and small baby clothes.
They typically feature multiple arms that can be extended for use and folded flat against the wall to save space.
The racks are often made of plastic or metal and may include integrated clips to securely hold items while drying.
Similar products are widely available online from retailers like Amazon, Temu, and various home goods stores. [1, 2, 3, 4]