Tube 200 is made of circular terry knit and is 30 cm long. It can be used as a headband and neck warmer. Ullfrotté Original 200 is the finest type of Ullfrotté. The fabric is durable and consists of fine merino wool, polyamide and, most importantly, air! This air in the fabric is important because it insulates the heat produced by your body. 60% merino wool 25% Polyester 13% Polyamide 2% Elastane