The USMC FROG silkweight thermal bottoms are lightweight flame resistant base layer trousers. They are designed to provide moisture wicking and comfort in hot and layered environments while offering protection against flash burns.

• Color: Coyote brown
• Material: Flame resistant silkweight fabric
• Part of the Flame Resistant Organizational Gear (FROG) system

Issued to Marines as a base layer garment for deployment and training use.