Two separate main compartments with internal sleeves and zip closure, two front admin pockets with zip closure. All compartments are equipped with a two-way zipper and pull tabs. Multiple lateral compression straps. Material: 100 % polyester. Measures Medium: 45 x 24 x 26 cm, 25 ltr. Measures Large: 52 x 30 x 32 cm, 40 ltr.