Feetures! Light Cushion/Multi-Sport Crew Sock Y-heel construction keeps sock from sliding into the shoe. Mesh construction on top of the sock provides ventilation for added breathe-ability. The PerfectToe (No irritating toe seam.) SnugFit Technology?Unique Power Bands of Lycra hug your entire foot for maximum support. This snug, supportive fit eliminates movement to prevent blisters. iWick fibers wick moisture to keep feet cool, dry and odor-free.