Jason Markk Repel. Jason Markk now are one of the most trusted brands to keep your precious sneakers pristine. This premium water and stain repellent spray delivers a durable, breathable barrier that repels liquids and stains. Safe to use on all materials including (and not limited to) suede, nubuck, leather nylon and canvas. This product does not alter the look or feel of the materials and is a must-have product for any sneaker enthusiast.