# Which materials make the best warm socks?
Fabrics made from animal fibres are the best insulators. If you’re looking for warm socks for moderate winter temperatures, wear wool! Knee-high socks are better at retaining heat than mid-calf length models as they cover more of your leg, sitting just under the knee.
# What type of wool should I choose?
We use several types of wool to make our socks:
- Merino wool socks : this is a fairly thin type of woollen sock that will easily fit into any shoe.
- Super-durable wool socks : these warm socks are particularly durable and are slightly thicker than models made from merino wool.
- 90% wool socks : particularly thick and soft, these extremely comfortable socks will keep you warm.