I only tried them on indoors. I have pets, so there's a possibility of fine hairs getting on them. The pet's living area and the product storage area are separate. No price reduction. They are size S. I had to select a size, so I've chosen 23cm for now. I will ship them without any waterproof protection, with the shipping label directly on the box they came in. See photo 3. I am also selling them elsewhere, so please comment before purchasing.