Designed primarily for tighter fitting footwear, Superfeet BLUE is Superfeet's most versatile product. BLUE provides excellent biomechanical support for the widest variety of foot shapes. Featuring AgionŽ antimicrobial top cover treatment to reduce bacteria and help prevent foot odor. Ideal for feet with low to medium arches that cannot tolerate maximum support. Recommended footwear: Cleated athletic footwear, running and hiking shoes, and all types of casual and dress shoes.