Nickelodeon Big Time Rush 3-piece Twin Sheet Set. Get set for some seriously swoon-worthy snoozes with this Nickelodeon Big Time Rush Twin Sheet Set. Accented with scribbled star and heart graphics, "BTR" text, striped accents and paint-splattered details, this 3-piece set is perfect for any sleepy super-fan. Includes a fitted sheet, top sheet and pillowcase. Fits standard 39 x 75-inch twin mattresses; Pillowcase: 20 x 30 inches. Made of 60% cotton, 40% polyester material; 200 thread count. Machine wash cold, tumble dry low.