The Massage Flip Flops Arch Support Acupressure Massage Slippers in red are designed for men in US shoe sizes 9-10. These sandals feature a comfortable synthetic lining, rubber outsole, and insole for added durability. The flip flop style and arch support make them ideal for providing a relaxing acupressure massage experience while promoting reflexology. Perfect for those looking for a blend of style and wellness in their footwear.