Due to Covid-19 the USPS is experiencing an unprecedented amount of missing or lost packages, tracking malfunctions and delayed delivery. While KMI offers free USPS shipping, there is far more risk. FedEx/UPS is more expensive and we cannot cover their costs, however, they are far more reliable and they have actual real customer service. We advise you to choose UPS shipping for your items rather than free USPS. Although the choice is yours.