A catheter should be flexible in nature in order to adjust to the urethral contours. The material should be biocompatible, so that it does not cause allergic reactions, and also be temperature-resistant. The catheter you buy should be ready to use and one which does not require any 'handling' to avoid risk of infection. Different types of <a href="https://www.healthproductsforyou.com/c-urological-disorders.html" target="_blank">catheters</a> are available on this site to suit different needs.