Return Policy

Unopened Items

For unopened items, you may return them within 30 days. Refunds will be issued in the original form of payment, minus any discounts, bank charges (usually 3%), shipping, and a 15% restocking fee. Return shipping fees apply.

If you received a ‘Free Shipping’ order, we will deduct the original shipping cost. The shipping cost would be applicable for both ways.

Please note there might be special circumstances where we might have had to ship from our international warehouse, in which case the original shipping cost from the international warehouse to the destination will be applicable. Return shipping cost, as applicable, from the customer's address to Optimal Breathing's warehouse will also be chargeable.

Store Credit

Beyond the initial 30 days, refunds are not available. However, within 45 days, you can opt for store credit, with shipping fees subtracted, as previously explained.

Opened Items

For opened items, the refund will be in the original form of payment, less any discounts, shipping, and 15% restocking fees.

O2E2 Oxygen Machines

A restocking fee equivalent to 15% of the purchase price will be deducted and you must pay for all shipping. If the machine has more than 5 hours added, it will be treated as a used unit, and the refund will be done accordingly.

Return Instructions

  • Contact us at for an authorization number before returning items.

  • Securely package items in sturdy packaging.

  • Indicate whether you prefer an exchange or a refund.

  • Include your name, address, telephone number, and reason for return/refund.

  • For optimal service and tracking, use USPS Priority or UPS Ground Shipping for O2E2 Oxygen Machines.

Ship Returns to

Optimal Breathing

282 Fischer Rd

Fort Mill, SC 29715

For any questions or concerns regarding returns or refunds, email us at or call us at +1-704-597-6775.