Feature●Quick-drying material dense cloth, quick-drying when landed, reduces the discomfort of being wet.●The length and width can be adjusted to suit people of different shapes.●Quick-release buckle design, can quickly untie the vest when hooked underwater.●Package Include: 1 x Diving Backpack [Cylinder Tank NOT Included]Description Applicable cylinder tank capacity: 2 liters | Applicable cylinder tank size: 33x11cm/12.99"x4.33" | Application: Recreational diving, Training diving. [Cylinder Tank NOT Included]