Jurassic World Boys 2-Piece Beanie Style Hat & Mitten Set. Get your little one ready for cold weather season with this adorable Jurassic World themed 2-piece beanie hat and matching mitten set. the pull-on beanie hat features the iconic T-Rex logo on the front and a pom-pom on top. This soft, comfortable set will ensure your little adventurer is all covered up on a wintry day! One Size Fits Most.