Helmet-type gas mask, United Kingdom, 1915

The canvas mask could be worn over a helmet and tucked into a uniform. The mask has glass eyepieces so the soldier can still see. The mask was soaked in chemicals to provide protection during a phosgene gas attack. Phosgene gas was particularly dangerous as it is colourless and almost impossible to smell. The gas affects the lungs and can cause heart problems. Symptoms appeared within 24 hours. ma…