Swim Moulds – Made While-U-Wait custom swim moulds. These made-while-you wait custom moulds are ideal for Irish seas and pools. They offer the perfect fit and are suitable for children and adults alike. Wearing custom moulds helps to prevent bone growth in your ear canals. This is brought on by swimming in cold water and can severely affect the shape of the ear canal, leading to wax build up, infections and hearing loss in the severest cases.