Dual-Zippered Compartments: Each bag comes with two zippered sections for sand, gravel, or other favorite contents 30lb weight: Each pack can hold up to one maximum weight of 13.6 kg in sand, rock, dirt and other contents Extreme use conditions: withstands strong wind and other natural weather elements Duffel bag two cylinders: each bag seam is doubled for durability, and comes with a Velcro strap for support and ease of use to attach High quality material: created with fabric 600D Oxford for premium quality and built to last. Note: Filling is not included