When Gao Guang ran at the fastest speed he could achieve, he realized he didn't have the sturdiness of heavy armor protection, but he also lost the speed afforded by wearing no armor.
Simply put, he was running slowly, and he wasn't bulletproof either—because he was wearing a Soviet-era lightweight L-1 isolation protective suit paired with a PMK-2 isolation gas mask.
The L-1 protective suit was already considered lightweight compared to the OZK chemical protective suit, but since it was an isolation suit, it was completely non-breathable. And the consequence of being non-breathable was that no matter how much sweat he produced, it was all trapped inside the suit.
It was February, still quite cold, yet Gao Guang, wearing the protective suit, was running back and forth through the tunnels. Even without a winter jacket underneath, he was already soaked in sweat.
