The SI Defense Arch Tee showcases breathable, lightweight cotton/polyester fabric, a reinforced collar liner, and flat seams for all-day comfort. It features a subtle arch graphic on the front chest plate with the SI Triangle logo and our founding year, 1975.
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Available Colors: Grey, Black
Size Reference for Oakley Men's Si Defense Arch Tee
Available Sizes: XX-Large, Medium, Small, Large

























