My 8 year old daughter is very sensitive to the seam on her toes. I've bought many different brands of seamless socks and some of them come loose in the toe box (seamless) and some aren't completely seamless. These are not only seamless, but also very high quality materials, perfectly stretchable, not too tight and not loose. Not too thick and not too thin. Good for summer and winter. Just perfect. These are the only socks my daughter wears.
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