gray Lululemon Metal Vent Tech short-sleeve athletic t-shirt Medium The gray Lululemon Metal Vent Tech short-sleeve athletic t-shirt in size Medium is a high-quality activewear top designed for men. Made with a medium fabric wash, this t-shirt from the Lululemon Metal Vent product line offers a comfortable and athletic fit. The short sleeves and regular sizing make it perfect for active occasions, providing both style and functionality for the modern man on the go.