Backpacks with top valve
Top valve
— in its classic form, the top valve is a piece of fabric that covers the top of the backpack for additional protection (in particular, against moisture). At the same time, in modern backpacks, this element very often has its own pockets and can be used to store small but important things. This detail is especially common among travel backpacks (see "By direction"), although it can also be found in other varieties.Show