LEGO® Wear LEGO® NINJAGO® knitted hat for children. A warm winter hat is a must in the cold months, and this LEGO® NINJAGO® inspired hat is just as cool as it is warming. The LEGO® Wear hat has a nice knitted pattern of the text “NINJAGO” on the front. The lining is made of 95% cotton and 5% elastane, and there is an iconic reflector on the back.