Here's the hat for the season. The Stetson Wool Blend Herringbone Ivy Cap, a classic choice for cooler weather. Details: Lovely herringbone pattern highlights this iconic cabbie hat, plaid dark green interior, grosgrain sweatband. Triple rivets in the brim release the right amount of heat, keeping the wearer warm and snug all season long. An iconic piece of Stetson's 150th Anniversary collection. Material: Wool.