Sub-Resk is a conceptual gas mask designed to clip onto the handheld overhead railing in a subway car. The gas mask was designed by Sang-eon Lee and Yeong-ho Yoonto and was meant to be used in emergency situations, such as when a train breaks down and smoke begins filling the tunnel.
Sub-Resk comes in a self-contained unit that would be built into the subway's handheld straps. The gas mask comes in two pieces and must be assembled for use. As mentioned by Radhika Seth of Yanko Design, there are a few obvious issues with this design. For one, the oxygen supply seems to be low as the mask isn't connected to an oxygen canister. Another issue is the fact that the mask must be assembled. In a smoke-filled subway car it may be difficult to piece together the Sub-Resk. Regardless, I think that Sub-Resk is still a great design that could potentially save a lot of lives with a few design tweaks.