Crafted from the finest 200gm pure merino jersey fabric these boxers will keep you comfortable in any situation year round natural odour prevention breathability and softness are complimented by flatlock seams and a brushed elastic waistband why icebreaker merino the merino is an ancient breed of alpine sheep over millions of years they evolved a superfine highly breathable fleece to protect them from freezing winters and scorching summers it will do the same for you what is merino woo