Gas Mask

<svg
    xmlns="http://www.w3.org/2000/svg"
    width="100"
    height="100"
    viewBox="0 0 512 512"
>
    <path
        d="M255.999 249.713c-46.241 0-83.859 37.619-83.859 83.859s37.619 83.859 83.859 83.859c46.241 0 83.859-37.619 83.859-83.859 0-46.24-37.618-83.859-83.859-83.859zm8.762 52.172c13.889 3.846 24.119 16.59 24.119 31.686a32.671 32.671 0 0 1-4.286 16.204l-19.833-19.833v-28.057zm7.441 60.282a32.667 32.667 0 0 1-16.203 4.288 32.68 32.68 0 0 1-16.204-4.286l16.204-16.204 16.203 16.202zm-24.964-32.223-19.833 19.833a32.66 32.66 0 0 1-4.288-16.204c0-15.097 10.231-27.841 24.12-31.686v28.057zm-43.902 43.899c-8.566-11.175-13.672-25.134-13.672-40.271 0-33.606 25.125-61.434 57.573-65.738v16.111c-23.63 4.161-41.645 24.824-41.645 49.628 0 10.739 3.387 20.696 9.132 28.882l-11.388 11.388zm52.663 26.064c-15.136 0-29.096-5.107-40.271-13.672l11.388-11.388c8.186 5.746 18.143 9.132 28.882 9.132s20.696-3.387 28.882-9.132l11.388 11.388c-11.173 8.566-25.133 13.672-40.269 13.672zm52.663-26.064-11.388-11.388c5.746-8.186 9.133-18.143 9.133-28.882 0-24.804-18.014-45.466-41.643-49.628v-16.111c32.448 4.304 57.573 32.132 57.573 65.738-.003 15.137-5.11 29.096-13.675 40.271z"
    />
    <path
        d="M511.451 337.657a8.768 8.768 0 0 0-4.563-4.915l-54.435-24.949a8.762 8.762 0 0 0-11.616 4.314l-11.684 25.492-15.834-7.261a161.987 161.987 0 0 0 4.879-39.522v-1.684c13.87-8.34 23.196-22.328 25.432-38.7a381.682 381.682 0 0 0 3.135-68.382c-.808-18.223-8.56-35.152-21.827-47.673a70.445 70.445 0 0 0-8.443-6.806 167.859 167.859 0 0 0-28.327-51.417l10.607-10.607a8.761 8.761 0 0 0 0-12.391l-30.431-30.433a8.759 8.759 0 0 0-12.39 0L342.27 36.407c-26.068-15.435-55.738-23.574-86.28-23.574-30.534 0-60.2 8.138-86.257 23.574l-13.684-13.684a8.759 8.759 0 0 0-12.39 0l-30.433 30.434a8.761 8.761 0 0 0 0 12.391l10.607 10.608a167.87 167.87 0 0 0-28.324 51.41 70.278 70.278 0 0 0-8.453 6.812c-13.266 12.519-21.017 29.45-21.827 47.673a381.423 381.423 0 0 0 3.135 68.381c2.236 16.377 11.566 30.367 25.441 38.706v1.679c0 13.628 1.699 26.866 4.879 39.522L82.85 337.6l-11.684-25.492a8.76 8.76 0 0 0-11.616-4.314L5.111 332.742a8.765 8.765 0 0 0-4.314 11.616l68.611 149.694a8.764 8.764 0 0 0 7.971 5.114 8.733 8.733 0 0 0 3.645-.799l54.435-24.949a8.765 8.765 0 0 0 4.314-11.616l-11.685-25.494 32.099-14.703c26.866 19.735 60 31.41 95.814 31.41 35.815 0 68.949-11.676 95.813-31.41l32.099 14.703-11.684 25.493a8.762 8.762 0 0 0 4.314 11.616l54.435 24.949a8.733 8.733 0 0 0 3.645.799 8.764 8.764 0 0 0 7.971-5.114l68.611-149.694a8.76 8.76 0 0 0 .246-6.7zm-82.192-154.829a364.044 364.044 0 0 1-2.991 65.233c-1.748 12.796-9.919 23.447-21.859 28.492-12.086 5.107-25.602 3.508-36.153-4.276-4.818-3.554-9.5-7.06-14.074-10.527l37.48-59.85a8.76 8.76 0 0 0-7.426-13.412h-24.43l36.163-52.142c18.819 7.233 32.338 25.018 33.29 46.482zm-93.956 18.485a8.762 8.762 0 0 0 7.763 4.699h25.344l-28.182 45.006c-18.916-14.783-35.406-28.659-49.229-41.437-11.738-10.851-16.056-26.474-11.547-41.793 4.484-15.237 16.501-25.972 32.144-28.719 21.826-3.831 43.603-5.917 64.726-6.201.244-.004.485.007.729.007l-41.183 59.381a8.76 8.76 0 0 0-.565 9.057zm26.844-160.002 18.042 18.042-21.09 21.09-18.041-18.042 21.089-21.09zm-212.296 0 21.089 21.09-18.042 18.042-21.089-21.09 18.042-18.042zm-64.127 206.75a363.893 363.893 0 0 1-2.991-65.233c1.25-28.156 24.113-49.965 52.206-49.965.243 0 .49.001.732.005 9.833.132 19.812.672 29.867 1.58l-40.094 57.809a8.76 8.76 0 0 0 7.2 13.756h25.342l-45.259 72.279a37.475 37.475 0 0 1-5.145-1.737c-11.939-5.047-20.111-15.698-21.858-28.494zm95.752-55.055a8.761 8.761 0 0 0-7.666-4.518h-24.428l35.913-51.782a426.124 426.124 0 0 1 15.1 2.363c15.645 2.745 27.66 13.482 32.144 28.719 4.507 15.319.19 30.943-11.547 41.793-20.272 18.739-46.266 39.833-77.259 62.697a37.11 37.11 0 0 1-9.807 5.176l47.31-75.553a8.756 8.756 0 0 0 .24-8.895zm-99.79 285.78L20.378 345.021l38.504-17.647 61.309 133.765-38.505 17.647zm39.103-58.409-30.638-66.848 13.769-6.315c8.847 23.779 23.122 44.937 41.308 61.968l-24.439 11.195zM256 435.492c-78.044 0-141.84-62.118-144.573-139.506a53.82 53.82 0 0 0 10.598 1.058c11.351 0 22.557-3.615 32.113-10.664 31.511-23.245 58.006-44.755 78.752-63.931 16.489-15.241 22.798-38.083 16.463-59.608-6.31-21.444-23.908-37.167-45.926-41.032-22.745-3.992-45.461-6.166-67.519-6.464a70.312 70.312 0 0 0-17.369 1.955c4.813-10.169 10.754-19.747 17.766-28.668l10.399 10.399a8.759 8.759 0 0 0 12.39 0l30.433-30.433a8.761 8.761 0 0 0 0-12.391l-6.966-6.966c22.393-12.381 47.563-18.88 73.439-18.88 25.861 0 51.033 6.499 73.437 18.881l-6.966 6.966a8.761 8.761 0 0 0 0 12.391l30.433 30.433a8.759 8.759 0 0 0 12.39 0l10.4-10.4a150.607 150.607 0 0 1 17.77 28.674 70.59 70.59 0 0 0-17.379-1.959c-22.057.297-44.774 2.472-67.519 6.464-22.019 3.865-39.617 19.587-45.926 41.032-6.334 21.526-.026 44.367 16.463 59.608 20.744 19.176 47.241 40.685 78.752 63.931 9.558 7.051 20.76 10.664 32.113 10.664 3.535 0 7.086-.354 10.606-1.06-2.733 77.387-66.53 139.506-144.574 139.506zm110.772-26.31c18.187-17.031 32.461-38.189 41.308-61.968l13.769 6.315-30.638 66.848-24.439-11.195zm63.541 69.604-38.504-17.647 61.309-133.765 38.504 17.647-61.309 133.765z"
    />
</svg>