Frozen Ugly Christmas Sweater Friends Girls Sweatshirt Move over Kristoff, Sven's found himself a new best friend on the Disney Frozen Ugly Christmas Sweater Friends Oversized Red Sweatshirt! Olaf and Sven grin at each other on this cute red boyfriend-cut holiday sweatshirt styled in a fun ugly Christmas sweater pattern across the front. 50% Cotton, 50% Polyester.