During World War II, nylon stockings disappeared from store shelves as the valuable synthetic material was diverted to make critical wartime supplies such as parachutes, flak jackets and aircraft fuel ...
Scientists have assessed the filtering efficiency provided by various types of facemask modifications and found that masks made of two layers of woven nylon are some of the most effective when fitting ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback