Incredibly easy to uncap, Zebra's Optex 1 EZ highlighter has an "EZ cap" that you can pop right off by squeezing it at the special squeeze points. This highlighter is refillable, reducing waste and saving costs. Refilling is extremely simple and requires little effort! The highlighter is made of recycled materials, adding to its environmentally friendly features. Zebra also designed it to last longer than others before the ink runs out. The ink has good lightfastness, producing bright, vivid color that doesn't fade.