The illustration on the T-shirt represents a captivating and lively scene, capturing the essence of a Retro Summer Camp theme. The main focus is on the vibrant "Nickel City Athletics" logo placed at the top of the design. Beneath it, the illustration unfolds, featuring a picturesque landscape that perfectly embodies the spirit of an adult summer event. The design showcases a blend of natural elements and athletic activities to create a harmonious and nostalgic ambiance.