"We will do our very best to rehabilitate your gear. That being said, some gear is past saving with Nikwax. We will not be able to rehabilitate shoes with holes or worn out soles, delaminating jackets, ripped items, broken zippers, and so forth," it says on the Gear Rehab program page. "While we are able to rehabilitate most types of gear, there are some that are unable to be effectively cleaned and waterproofed. These include: rubber & Tyvek rain suits; rubber boots, shoes, and gloves; etc."