 | Securities & Exchange Commission Division of Corporation Finance Office of Life Sciences 100 F Street, N.E. Washington, D.C. 20549 April 12, 2022 Attention: Ms. Christie Wong Mr. Michael Fay Re: Align Technology, Inc, Form 10-K for the Fiscal Year Ended December 31, 2021 Filed February 25, 2022 File No. 000-32259 Dear Ms. Wong and Mr. Fay: Align Technology Inc. (“Align”) acknowledges receipt of your comment letter dated March 31, 2022 (the "Comment letter") with respect to the above-referenced filing. As discussed with the Staff on April 12, 2022, the Company respectfully requests an extension to respond to the Comment Letter in order to provide sufficient time for the Company to prepare the necessary response. The Company is committed to responding to the Comment Letter promptly and intends to provide a response to the Staff no later than April 22, 2022. We are grateful for the Staff's assistance in this matter. In the meantime, if the Staff has any questions, please do not hesitate to contact me at (408) 470-1006. Yours truly, /s/ John F. Morici John F. Morici Chief Financial Officer and Executive Vice President, Global Finance | ||||