Hypo helmet
| Hypo helmet | |
|---|---|
Indian troops wearing Hypo helmets in a posed photograph, August 1915 | |
| Type | Gas mask |
| Place of origin | Dominion of Newfoundland |
| Service history | |
| In service | 1915–1918 |
| Used by | United Kingdom India Dominion of Newfoundland |
| Wars | World War I |
| Production history | |
| Designer | Cluny Macpherson |
| Designed | 1915 |
| No. produced | 2,500,000 |
The Hypo helmet, or British Smoke Hood (its official name), was an early British World War I gas mask, designed by Cluny Macpherson.