RIP-RESISTANT MARKERS: Made with long-lasting poly-vinyl, these spot markers provide exceptional durability, and the rip-resistant design ensures the markers can withstand a variety of games and drills on the playground or in Phys. Ed. classes. EASY TO CLEAN: The durable poly vinyl allows for easy cleanup with the use of soap, water and a rag. NON-SKID POLY VINYL -- Non-skid material makes these spot markers safe and effective for gym floors, hardwood, pavement, and other surface types. INDOOR / OUTDOOR USE -- Constructed with durable poly-vinyl, these spot markers are rip-resistant and built to withstand continued use on a variety of surfaces. BRIGHT COLORS -- Comes with a variety of bright, easy to see colors. Designed for clear visibility during games, sports, and other activities.