Water-Based felt-tip markers are made to withstand the toughest classroom use. All Milan markers have a cone-shaped tip which allows fine or broad strokes for details and wide areas alike. Their special design allows the tip to accept hard blows and quickly regain their original shape. The ink is water based but may not wash out of clothes. Non-toxic. For ages 3 and up. WARNING: CHOKING HAZARD - Small Parts. Not for children under 3yrs.