This Staedtler Lumocolor 350 Chisel Tip Permanent Marker is smudge-proof and waterproof, making it ideal for use at home, school or work, for a number of purposes such as labelling or sign writing. The ink is colour-intensive, low odour and Dry Safe, meaning you can leave the cap off the pen for days without it drying up. This marker can be used on most surfaces and is refillable up to 7 times.