All natural Wearing socks all day in the heat and inside work boots can make your feet particularly sweaty. Repeat that over several days and your feet health could be compromised. The Caterpillar Bamboo Socks are here to help this. Made from an all-natural fibre, these socks help to reduce bacteria growth during wear, which helps to increase your overall foot health. These socks are also fitted with reinforced areas around the heel and toe for greater comfort when wearing heavy, work boots.