0.8mm suits most patients. It feels closest to the active aligner, which helps compliance. 1.0mm is firmer and more durable, and is the better choice for patients who brux.
Both are available for single-arch and dual-arch cases. Discuss which is appropriate with reference to the patient's bruxism history and the amount of correction being held.
If this article did not resolve your question, your practice manager is your first point of contact for case and product support. For anything that needs a tracked outcome, start a chat with the OneSmile Concierge using the chat button on this page. Include the patient name, the case number and the current aligner number so it can be actioned without a follow-up question.