Opti-Cool Headgear is a light weight EVA foam and Lycra helmet. It is designed for everyday use and protection for individuals who require additional head support. EVA foam has both clarity and gloss, low-temperature toughness, stress-crack resistance, hot-melt adhesive waterproof properties, and is resistant to UV radiation. The helmet has impact and vibration absorption which allows for energy to disperse upon impact, reducing the chance for serious head injury. The interior of the helmet allows for ventilation throughout the headgear, providing airflow to keep the head cool. Wearers are also able to have 100 percent clear peripheral vision while using the helmet. OPTIONS: Custom decoration options. SIZES: xx-small, x-small, small, medium, large or x-large. WEIGHT: 4.7 ounces. COLOR: Black, navy blue or purple. WARRANTY/GUARANTEE: As stated by the manufacturer.