The S10 CBRN Respirator is a military gas mask that was formerly used within all branches of the British Armed Forces.

Following the mask's replacement by the General Service Respirator in 2011, the S10 is now widely available to the public on the army surplus market.

The S10 was introduced in 1986 as a replacement for the S6 NBC Respirator[1] in service from the 1960s, and is manufactured by Avon Rubber.

[3] The mask includes a fail-safe drinking device, a Secondary Speech Transmitter (SST) on the side[4] which a Clansman radio system microphone can be clipped to, and corrective lenses can be fitted to the eyepieces.

This mask is fitted with optical insert hooks, and therefore can be used by soldiers who wear glasses.