Nikwax Base Fresh Deodorizes, accelerates drying, and improves wicking of technical base layers Inhibits the build up of body odors in synthetic or wool layers Machine wash safe; Use with regular detergent Ideal for use on next-to-skin active wear such as Under Armour and Dri-FIT; Do not use on waterproof clothing. Water based, biodegradeable, and contains no PFCs or VOCs