Bath HavenQuiltedAir Bed Deluxe - Luxury Pillow and Spa Cushion for Full Body Comfort

When you are sitting on this mat in the tub, can you feel the suction cups underneath? What does the suction cup layout look like on the bottom? Pics?

Can you use Epsom salt with this?

Do you have to hang this to dry after every bath? I’m looking for one I can leave in place and only take up periodically to clean.

Can this be used in bathtub with jets?