Kids chest waders. Only worn twice before my son has outgrown them. Kept the water out, so did their job. An Amazon purchase, branded Tidwe. Cost new is around £70. Sizing is a bit curious, they are marked 8/9 which I’m sure is age rather than shoe size. Soles are marked 35, Pictured next to a size 6 shoe for reference but best check against the size chart pictured to be sure.
eBay