Carrying large amounts of gear The harness and waist belt on Sea to Summit's Hydraulic Dry Pack make portaging a whole lot easier, whether you're on the river, in the airport, or anywhere else. Easy to put on and remove, the harness system attaches to the bag with a series of buckles as tough as the bags themselves. . TPU laminated 600D heavy duty waterproof fabric high performance and abrasion resistant. Nonwicking TPU roll top closure with innovative interlocking profile that is secure and waterproof. Welded construction for durable waterproof seams and snag free seam profile. Durable PVC free and UV resistant fabric sheds water and does not crack in extreme cold. Oval base to resist rolling. Features a replaceable buckle with stainless steel pins. Harness system is easy to put on and take off: Harness and waist belt feature open construction of EVA foam and air mesh, allowing plenty of airflow and rapid drying without sacrificing comfort Fully adjustable back length and height adjustable sternum straps Screen printed diagrams on the welded patch show the herringbone pinharness removal steps 7075 T6 anodized aluminum buckles are robust and fail safe Low profile attachment points to reduce snagging when harness is not attached. Dimensions for oval base and height: 16.5 x 11.8 x 39.37 in.. Volume: 90 L 5492 cu. in.