The recall page from CPSC does indicate that incidents may take place during “high-intensity” activities. Priced generally between $30 and $46, the socks are available in black, featuring the phrase “32-degrees HEAT” on the retail packaging, user manual, battery pack casing, and battery pack packaging.
Consumers are requested to return the socks either at Costco locations or online. Remember, you can always go to CPSC.gov for recall updates on various products. Additionally, there are some electronic policies at Costco that every customer should be aware of.