e-joy Wind Tour Blue Camping And Travel Single Sleeping Bag Sack for Spring and Autumn Summer 84.5" 29.5" Size: 84.5"*29.5" . Filling material: hollow cotton Cotton sleeping bag is more comfortable. Hollow cotton fillings leads to heat retaining. Gorgeous zipper with double sliders is more convenient. Velcro design can prevent the zipper from dropping. Drawstring can adjust the tightness according to your requirement.