Using these sandals is a breeze. Just slip your feet in and start walking. You'll immediately feel the comfort of the EVA and the airbag. When using the bottle opener on the bottom, make sure to place it firmly on the bottle cap and pry gently. As for maintenance, keep them away from sharp objects to avoid damaging the leather. Clean the leather with a soft, damp cloth regularly. Don't expose them to extreme heat or cold, as this may affect the EVA and the leather. With proper care, these sandals will serve you well for a long time.