Fleece is an incredibly popular fabric used by most outdoor enthusiasts as its light and very warm. Sometimes after a lot of wear, fleece can soak up water instead of repelling it because of dirt, so give it a good wash first in Nikwax Tech Wash first, then add water repellency back in with Nikwax polar Proof. This is a safe, water based liquid and not harmful to the environment. It will revitalise your fleece garments and maintain the breathability too. No need to tumble dry to activate, just pop it in the washing machine or hand wash and air dry afterwards.