Performance Technologies: Velcro(R) on front and back to secure socks 4-way stretch, moisture-wicking fabric for optimal feel Mesh and groin ventilated for enhanced breathability Silicone improves lower leg grip and prevents shin pad from slipping Lower-third of Core Flex pocket designed in natural, comfortable position Padding Composition: BioFlex(TM) cup features integrated gel perimeter pad for maximum flexibility and comfort