Bamboo Bamboo socks are light, soft and feel silky on the skin, making everyday use very comfortable. They are hypo-allergenic, which are great for those with sensitive skin. They make perfect treats for your feet. Prolen Siltex is a special yarn modified by an antibacterial additive on basis of biogenic silver ions. He inhibit the growth of bacteria, funghi and moulds, reduce unpleasant smells, keep a biological balance of your skin and set a hygienic freshness. Soft Comfort fibre. This is a high density exceptionally stretchy fibre. It stretches further and more easily than conventional elastane, and yet has more recovery power, meaning that socks stays put without cutting off your circulation or leaving you with red marks on your skin.