Microclimate Care™ – Prevail’s system of creating a favorable microclimate by incorporating performance enhanced features that help maintain normal skin temperature and moisture at the skin’s surface. 100% Breathable – air circulates through entire brief. AirMax™ Layer – specially formulated breathable material traps wetness inside but allows air, heat and humidity to escape. Doublesorb™ Layers – soft, dual core system helps lock up moistures. Expandex™ Wings – soft, flexible stretch panels provide a secure fit.