Testors 307588 Spray Chalk, 6 Oz, Pink Use to decorate, create art and draw temporary chalk designs on a variety of exterior surfaces such as concrete, asphalt, sand, snow, grass, glass and more Washable, non-toxic chalk formula dissolves naturally over time with exposure to rain or water Instantly turns into powder as it sprays and each can covers up to 80 linear feet for fun and games Durable spray lasts up to 7 days without moisture Flat chalk finish in vibrant colors allows for unique designs that are easy to see