How do I know my valves are sealed shut?

Scrubba™ Wash Bags come with double closure air valves. The first closure is the cap, while the second is a deformable base component. To let air out simply open the cap and squeeze the sides of the valve, forcing the base component to open at the slit. Squeezing the valves from the outside while watching from the inside will help determine if your valves are properly opened or closed.