Women's size 8 platform thigh high boots

I believe I bought these from Venus a few years back. I have since broken my ankle and cannot really wear heels at all. These particular boots were never worn and have just sat in a box in my closet for a few years. There are no imperfections that I can find. These boots do have a platform of 1" and a heel of about 5.5". These come from a smoke-free home. I am guessing on the material