By joining AAAS, you are committed to advancing science, engineering, and innovation. Thank you for your support!

*Offer valid from June 30, 2017 to July 31, 2017, for new individual members only. There is a limit of one baseball cap per membership order. Please allow up to six weeks for domestic delivery and up to eight weeks for international delivery. The AAAS baseball cap is provided as is without any guarantees or warranty and cannot be exchanged or returned. In association with the product, AAAS makes no warranties of any kind, either express or implied, including but not limited to warranties of merchantability or fitness for a particular purpose.