Rivian Motors Shirt Men's XL Long Sleeve T-shirt Black Double Sided Employee. This Rivian Motors shirt is a Men's XL long sleeve t-shirt in black, featuring a double-sided design with the Rivian logo. Made from cotton knit fabric, this classic fit t-shirt is perfect for car enthusiasts and fans of the USA. With a crew neckline and regular size type, this shirt is suitable for all seasons and is a great addition to any wardrobe for those who appreciate quality and style.