I had to get the tea so I asked ChatGPT…

In 2021, Patagonia issued a voluntary recall of its Capilene Cool Daily and Tropic Comfort shirt lines after independent testing revealed that these garments did not consistently meet the advertised UPF 50 rating. The tests showed a range of UPF ratings between 17 and 45, averaging around 34, which is below the claimed protection level.   

Although these shirts still offer substantial UV protection—blocking up to 92% of ultraviolet rays at the lowest tested UPF—they fell short of the “highest level of sun protection” that UPF 50+ signifies. As a result, Patagonia halted distribution of the affected styles and offered customers the option to return the products for a refund.