Have been keeping an eye on the Ergohumans when I stumbled upon this on their front page. Promotion details don't seem to exclude any specific product range, but feel free to correct me if you find otherwise.
"10% OFF EVERYTHANG when you spend $149 or more
Promotional Period: 12th February 2021 12:01am to 15th February 2021 11:59pm
Promotion: 10% discount applies with you spend $149 or more.
Promotion Details: 10% discount automatically applied at checkout. Minimum spend of $149 in one transaction. Shipping costs and purchase protection not included."
*Edit: Add code ANN5637YE to get extra $50 off $300+ spend as well. Credit to swimmingtoad.
Combining the two deals would get the Ergohuman V2 Mesh for $579.09 + shipping.