The Hardshell Twin Pack from Nikwax combines one 10 oz. bottle of TX-Direct Wash-In and one 10 oz. bottle of Tech Wash to clean and waterproof your technical outerwear. A safe non-detergent cleaner for synthetic waterproof clothing, equipment, insulated garments and sleeping bags. Restores the DWR - durable water repellency of all waterproof breathable laminates, coatings and microfibers. Easy wash in application. 100% water based and biodegradable. Contains no flourocarbons/VOCs