When evaluating anti-slip socks, prioritize the material composition, typically a blend of combed cotton (75-80%), nylon, and spandex to ensure breathability and elasticity. The most critical component is the grip material; ensure the dots or patterns are made of high-quality PVC or Silicone that is heat-pressed to prevent peeling after multiple washes. For medical or elderly care use, verify that the socks feature a non-constricting top band to promote circulation and have a double-sided grip design to ensure safety even if the sock rotates on the foot.