Wigens Jacob - Ivy Style 100% Wool Herringbone Cap. Tweed is a herringbone pattern; Blue is a dark grey herringbone over a background of navy blue, grey and beige. Brown is a deep chocolate brown herringbone over a lighter brown background with beige and grey. Dark Grey is a black herringbone pattern over dark grey background.- In color Blue and Brown there is a faint windowpane plaid overlay. Tweed material is hand-woven in the UK. Wigens Jacob is fully lined. Swedish Design and Quality - Made in Estonia. Wigens says - Use Your Head.