adidasUnisex-Adult Adissage Slides Sandal

Is this shoe a women's or men's shoe? I would like to buy a pair to fit a men's size 10.5

I plan o leaving these in the trunk of my car to change into when i get off work but it's extremely hot here,triple digits, will they melt in my car?

Could someone measure the bottom of the sandal from top to bottom? Because I seem to be getting sizing wrong

Do these come with arch support?