Merino wool is from a particular breed of sheep that produce finer and longer strands of hair. This  creates a softer, stronger knitted or woven material. It has become increasingly popular as people have come to realise how verstatile this material is .Merino is generally more breathable than other wool types and has started to be used to make superior undergarments for wintersports as well as  its more conventional use as an overgarment.