https://www.amazon.com/dp/B00FKZS22S/ref=cm\_sw\_r\_cp\_api\_i\_nQfDCb1TH2JCN
I have these and love them. But my issue is mainly sweaty hands and griping weights, not calluses from rowing (although that does help).
I also found these on Amazon which are not OTF branded but appear to be similar. The Gripper Glove | Fit Four Callus Guard Fitness Gloves for WODs, Weightlifting & Cross Training Athletes - Enhanced Silicone Grip Palm (Hot Pink, X-Small) https://www.amazon.com/dp/B00FKZS22S/ref=cm_sw_r_cp_api_i_nQfDCb1TH2JCN