The nib is a chisel tip which allows marking between 1 and 5 mm. It can be used on inkjet printouts, laser prints and hand written text. The pigmented water based ink easily washes out of clothing. The highlighter is airplane safe with automatic pressure equalisation preventing the pen from leaking on board aircraft. Opening the Textsurfer is easy thanks to the twistable cap. This highlighter is green. Take your highlighter on the go using the inbuilt pocket clip.