Crew neck, long-sleeve circular knit with no longitudinal seams. The back is longer to prevent gaps. Cuffs are knitted. 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 as it insulates the heat produced by your body. 60% merino wool 25% Polyester 13% Polyamide 2% elastane