ALPS Liberty Liner II allows the expulsion of sweat and air through a built-in valve either through the pin or reducer.
The one-way evacuation valve has be en strategically placed distally to evacuate any air between the user’s skin and the liner.
VSDT-XX-6 Liberty Liner with evacuation valve, Locking , 6mm uniform, HD Gel
LDA-764 Liberty Liner II Reducer with Built-in Valve – Sold Seperately
LDP-764 Liberty Liner II Pin with Built-in Valve – Sold Seperately