This sailing harness is from the estate of a family member. I'm not a sailor so am limited in answering questions about it. It is vintage but appears to be intact and sound. The back has the brand name "Sailor's Tailor". This company is still in business but apparently no longer makes this product, just boat covers now. https://www.sailorstailor.com/products.asp
I will accept return if you're not satisfied with it but buyer pays return shipping.