The Gymshark Onyx 50 Seamless L S Muscle Fit T shirt Black Brand Blue combines performance engineering with sharp athletic styling. Dressed in Black with Brand Blue accents, the seamless construction enhances comfort while emphasizing a streamlined muscle fit silhouette. The lightweight fabric keeps it breathable for training sessions and high intensity workouts.

Gymshark’s Onyx line focuses on sculpted fits and technical fabrics, and this long sleeve version reflects that commitment. The black base keeps it versatile, while blue detailing adds subtle contrast and brand identity. It feels purpose built for performance, designed to move confidently through every rep and session.