Willoughby Micro Crew Lightweight Hiking Socks cap 000 L (the filter will Colour:Nightblue Baltic 000 L (the filter will stop allowing water to flow through once it has reached the end of its lifetime * Adds renews water repellency and revives breathability * Prolongs the life of gear and optimises outdoor performance * Easy to apply can be used in a washing machine no tumble drying required * Will not affect cosmetic appearance * WaterBased environmentally friendly biodegradable non flammable non hazardous * Does not contain fluorocarbons * Guaranteed performance for 4 years from manufacture Height: Micro Crew Machine wash in cold water on gentle cycle with socks inside out