Why does the skin on your palms and soles of feet go all pruney when you come out of the bath?

Something I've always wondered. Due to osmosis??
Answer:
Normally, our skin is protected by natural oils (sebum) so water rolls off. However, if you have been in water for a while, that oil washes off removing your skin's waterproof protection. With the protection gone, your body soaks up the water causing the fingers and toes (also palms and soles) to swell and appear wrinkled. Did you know this only happens in the parts of the body that don't grow hair?No, it is not considered to be osmosis; it is absorption.

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