When you're out enjoying the leisure lifestyle, the last thing you want to have to worry about is a smelly holding tank in your boat or RV. Holding tank odors can be eliminated with scent-free Odorlos. Odorlos liquefies and treats your holding tank waste to completely and naturally eliminate odors, all while being safe and gentle for you and your holding tank. Odorlos uses a sophisticated natural technology originally developed in Scandinavia to be both exceptionally effective and good for the environment: it's 100% biodegradable and formaldehyde-free. Plus, it's easy-to-use!