It's modern copy of Guddal tunic (kjortel). viking's tunic from 10th century. It has been made by "Skupaya Khel'". Homespun from wool of three colours. Vikind dress, viking style. https://www.facebook.com/norsviking
This replica also has a square neck opening with overlapping flaps in front to seal out cold weather. The flaps are held shut with cords and loops (right).