This document specifies a test method for the determination of heating performance of wearable heating e-textile products. Wearable heating textile products are made of e-textile parts including a portable battery for electric heating and conventional textile parts for garments. This document includes the test procedure for the heating temperature and power consumption of wearable heating garments such as jackets, vests, etc. Heating gloves and footwear are excluded. The safety and security of heating products are excluded, as the information on thermal safety limits for heating products is addressed in IEC 60335-2-17 and IEC 62368‑1. The performance and safety of the portable battery are also excluded.