A soft, lightweight helmet made of compression- molded foam with a stylish head hugging design for a uniquely comfortable fit. Molded into small raised foam sections that are joined together with air channels between each section, much like small pillows - as opposed to closed cell foam helmet, which have a heavier, denser foam that retains a great deal of body heat. This helmet has a light fit with superior air flow to retain limited body heat. Easy cleaning with soap and water, towel dry. Available in three sizes based on head circumference at eyebrow level: Small 21"–21.5"; Med, 22"–22.5"; Large, 23"–23.5". Chin strap included. Weighs 3 oz.