24 Wraps are used to increase visibility on highways and construction sites. Wraps are made for poles, fences, post and more. These wraps are made with 600 x 600 Denier polyester fabric (known as Duck Canvas) and is waterproof, water resistant and mildew resistant. Wraps include a highly reflective material know as "Solas - A CO-38 (Safety of Life at Sea, US Coast Guard approved). Per 3M - "Solas-A meets 46 CFR part 164, subpart 164.018 for Type I and II retroreflective material used to enhance visibility of life saving equipment in nighttime or low light conditions". Wraps are secured using Velcro strips or brass grommets and bungee cords