US military usmc desert combat digital desert insect guard FROG shirt.

US military usmc desert combat digital desert insect guard FROG shirt.

The shirt is part of the Marine Corps Combat Utility Uniform (MCCUU) family in the Desert MARPAT camo pattern — tan/sand/brown digital camouflage (the desert version of MARPAT).
• The insect guard version means it is treated with a permethrin-based treatment (or equivalent) to repel insects. Often labeled “Permethrin” or “Perimeter Insect Guard.”
• Official issue (or authorized) garments are made to military specs, so many features are functional and rugged rather than decorative.

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Materials & Fabric Treatment
• Fabric: a blend, typically 50% cotton / 50% nylon twill (often called “NyCo twill”) is used for durability and comfort.
• Insect treatment: the blouse is impregnated with permethrin or an insecticide finish. This establishes the “insect guard” capability.
• The treatment remains effective for a number of launderings. One source claims 25 washes. 
• Infrared/IR signature considerations: The camo is designed to be IR-safe (i.e. minimize detection under IR illumination) as part of the uniform system. 
• Reinforcements: key areas like elbows are reinforced, sometimes double-layered.

All shirts new and Like new without hang tag.