Valve & Filter Techno™ Upgrade Kit £22.99 Share Pinterest Twitter Facebook The Techno™ Valve and Filter Kit is an upgrade from the ‘old’ City™ Mask Valve and Filter still being used by some people. The larger Techno™ Valve provides for easier breathing alongside the upgrade to the combined chemical/particle Techno™ Filter. The Techno™ Valve is robust and perfect for town use however it does not have the same characteristics as the Powa™ Valves when it comes to elevated breathing rates attributed to exercise or physical exertion. The Techno™ Filter is suitable for use in heavily polluted environments, i.e air that is full of diesel particulates or respirable dusts that lodge deep within the lungs and air sacs. Continue reading Size Medium Large Extra Large Quantity £22.99 Features Benefits Suitable for Easy breathe valves and diaphram made from medical grade silicon'Combination' Filter comprising chemical and particle filtrationDynamic Activated Charcoal Cloth (DACC™) Filters out non toxic dusts, sub-micron particulates and nuisance odours For use with any Respro® mask (with the exception of the Metro Mask)