Rocky S2V boots are lightweight and vented on both sides to release water. When worn with Rocky S2V socks, this state-of-the-art construction allows feet to breathe and quickly dry. Sieve technology draws cool air in and cycles warm air out. All boots feature a unique rounded edge outsole to ensure a stable foundation. The outsole design dramatically reduces ankle injuries due to roll over. All have flash and water resistant leather uppers and are PTFE coated for flame resistance. The S2V not only features sieve vents, but they are lined with Dri-Lex lining coupled with Aegis Microbe Shield. These boots also feature high-walled Vibram soles that are stitched to the upper. For cold weather conditions, look for the400g Thinsulate Ultra options.