These Staedtler Noris jumbo triangular felt-tip pens are safe and suitable for everyone aged 4 years and over. The set contains a wide choice of 12 high-quality markers in different colours, which are supplied in a cardboard case. The markers have an ergonomic, triangular body, allowing you to write and draw comfortably. They have a writing width of 3mm for a bold and eye-catching line, and feature a vented cap to improve the durability and performance of the pens. The cap-off time is 2-3 days. This increases ease of use: they can be left without the cap during that period without drying out. You don't have to worry about stains: the ink is washable from most textiles.