37.5 padding. Segmented construction. The jersey features protective foam in the most impact-prone areas. Poron XRD foam on the chest provides excellent protection. Size: Senior. Comfort is defined by the appropriate temperature and humidity outside our skin; these two components are incorporated into the concept of microclimate. 37.5 technology helps manage moisture that accumulates around the player for optimal comfort. Moisture is trapped in the layers of 37.5 equipment, evaporating moisture from the "player's microenvironment." Less energy cooling your body = more energy you put into the game. The more layers of 37.5 technology, the better.