The no-show socks have been done and redone - countless times with mixed results. Some are loose around the foot, others are too small and slip off your heel causing painful blisters. Nylon and XT2 silver fibers are knit into the seams to retain shape and fit. Additionally, there’s a silicone pad on the heel that grips your foot and prevents slippage and blisters. Our legal department says we can’t call them perfect, but we are throwing caution to the wind and we declare them damn near close-to-perfect.