Lasts 35% longer. Preferred by teachers! Nontoxic. Eco-Evolution: Here are some ways Crayola is conserving energy and making the products you love more environmentally friendly: Solar panels provide energy to produce one billion crayons and half a billion markers each year in the USA. Using recycled plastic in our products keeps hundreds of tons of plastic out of landfills each year. A new tree is planted for every one used to make our colored pencils. Lasts 35% Longer: Based on square foot coverage against key competitors. Contents and colors may vary. Please retain packaging for future reference. Safety Information: AP: ACMI: Art & Creative Materials Institute Certified. Conforms to ASTM D 4236. All Crayola art materials are nontoxic. Meets performance standard ANSI Z356.1. Quality Guarantee: We guarantee the quality of all Crayola products. If this product does not perform properly, please contact us. In the USA and Canada, call 1-800-Crayola (800-272-9652), weekdays 9 AM-4 PM ET. To learn more about other ways Crayola colors are getting greener all the time, go to Crayola.com. crayola.com. Made in the USA.