Based on the information provided, maintaining 25% of its manufacturing domestically seems to be a sound decision for New Balance. The company's focus on producing shoes with different widths and sizes to achieve a perfect fit for customers has helped it build a loyal customer base that values the brand's quality and performance. By keeping a portion of its manufacturing in the US, New Balance can differentiate itself from competitors who outsource all their manufacturing and can offer quick turnaround times to meet immediate demand, which helps build loyalty among retailers