Nikwax fabric and leather re proofing spray is an environmentally considerate spray on re proofer that applies a durable water repellent finish to footwear similar to the finish new boots and shoes have replacing this finish helps stop your footwear soaking up water and getting heavy and cold it also prolongs the performance of footwear features easy to use re proofer that prolongs the performance of footwear environmentally considerate water based with no fluorocarbons pfcs or hydroca