As for traction, it exceeds ASTM standards for grip. Rest assured, you’re staying firmly planted around the ground in these bad boys. Solid and straightforward, these just could possibly be the best waterproof work boots ever. Short sleeve shirts are frequently available in crew neck, v-neck, or button collar options. http://www.drugoffice.gov.hk/gb/unigb/en.wikipedia.org/wiki/Comfort