Robinson Crusoe rubber heeled boots

These are these cutest boots! They are definitely older, but I have no idea how old because I can't find them anywhere online. They show some wear but not much. No odors, holes, rips. Made in the USA. Feels like rubbber. The lining feels like a soft wool, it is not itchy. Size 10 listed on bottom of shoe. See measurements. A little over 7 inches in length. Thank you for looking!! vintage