Our bag has very smooth surface. It is easy to wipe clean. The capacity is 30 Liters. Dia is 10.6″, the height is 23.6″, Every bag has adjustable and removable shoulder strap for cross-body or shoulder carrying. Solid roll-top closure system provides secure watertight seal. Keep your gear dry in any wet situation where the bag is not fully submerged. Protect your valuables from water, snow, mud and sand. The price is including shipping cost to ca, QTY over 1000pcs by sea. Other specifications 2L,3L,5L,10L,15L,20L,25L,30L,35L. thanks for your order.