SmartKnit Big Toe AFO Socks are made to accommodate AFO toe straps, etc. They are made the same way a caterpillar spins its cocoon - starting at the toe and circling to the top. No more rubbing from uncomfortable seams! SmartKnit Big Toe AFO Socks are exceptionally soft, wick perspiration, anti-microbial and have a heel free design that ensures a perfect fit. AFO socks like they should be - a seamless, comfortable, cool second layer of skin between you and your AFO.