About the Kalf Trainer Socks Using a Meryl Skinlife yarn, with silver micro-particles to keep bacteria at bay, the trainer socks are ideal for very hot conditions where only minimum skin coverage is required. The fabric is lightweight and wicks moisture quickly, keeping your feet cool in the heat. Key Features > Quick drying with exceptional breathability > Meryl Skinlife yarn incorporates silver microparticles to keep bacteria at bay, preventing odour > Durable construction, staying fresh and soft for over 100 washes > low riding design increases airflow and keeps you cooler