Roll-Up Signs All mesh/roll-up signs require sign ribs for support. (Sold separately) Use Roll-Up Mesh Signs around roadwork, construction areas or job sites. Temporary warning Mesh Roll-Up Signs are easy to set up and store. You should refer to your local DOT guidelines and city requirements when using traffic control devices. Non Reflective (Daytime Use) The non-reflective 36" and 48" Roll-Up Signs are made of a 15 oz. tightly woven fluorescent orange mesh which gives the signs a solid appearance. Reflective (Daytime/Nighttime Use) The Reflective 36" x and 48" signs are made of a solid vinyl that is 3M Scotclite reflective. Custom Roll-up Non-Reflective Signs (Daytime Use) The custom roll-up signs are made of a solid vinyl (not mesh) fluorescent orange material. Custom Roll-up Reflective Signs (Nighttime Use) The Reflective 36" x and 48" signs are made of a solid vinyl that is 3M Scotclite reflective.