Can I wear a surfing hat in the ocean 17 days after an FUT hair transplant procedure and not affect growth or graft direction?

I’m 17 days post FUT transplant. Scabs have all gone, donor scar is sealed up. If I was to wear a material surf hat with a chin strap in the ocean to protect from the sun would any rubbing from the movement of the hat material from the waves on the recipient area affect growth or graft direction? Doctor advised grafts were secure at day 5 and swimming and full exercise was ok at day 10 however question is really around the potential affect of the material rubbing? 1-2hrs a day tops.