Pack includes one pair each of SmartKnit AFOs and Core-Spun AFOs SmartKnit AFO Interface Socks Seamless socks for those that require ankle foot orthosis (AFOs). SmartKnit AFO socks 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 AFOs are exceptionally soft, wick perspiration, and have a heel free design that ensures a perfect fit. AFOs like they should be - a seamless, comfortable, cool second layer of skin between you and your AFO. Core-Spun AFO Interface Socks Made especially for adults that require Ankle Foot Orthosis (AFOs), Core-Spun AFO Socks are exceptionally soft, moisture wicking, and have a heel-free design that ensures a perfect fit. Core-Spun AFOs socks are exactly what they should be - a comfortable, cool second layer of skin between you and your orthotics. Each sock is made by twisting a moisture-wicking fiber around an inner spandex “core yarn” to create one yarn. The result is an ultra-stretchy, form-fitting sock with a reinforced top band that is non-restrictive while staying in place without rolling or sliding down during the day. It's design prevents any rubbing from uncomfortable seams and makes for a fitted feel. The moisture wicking fibers help remove perspiration, ensuring a cool and drier sock that prevents stinky feet.