Elsa's eternal winter won't feel as cold if you snuggle up with Olaf and Sven on the Disney Frozen Ugly Christmas Sweater Olaf and Sven Black Sweatshirt! Your favorite snowman and reindeer smile out at you from this cute ugly Christmas sweater style sweatshirt that reads "Olaf & Sven" alongside Christmas trees and snowflakes! 50% Cotton, 50% Polyester.