Castelli Primaloft 13 socks

The Castelli Primaloft 13 are perfect socks for the winter season. They are made of an insulating synthetic material. This fabric offers plenty of warmth and excellent breathability. Furthermore, 20% of the socks are made of silk, which makes them wonderfully soft. A toe and heel reinforcement offers extra protection in sensitive areas. This makes Primaloft Castles ideal for the off-season.