Show off your passion for roller derby with this unique t-shirt! This black tee features a playful graphic that says "I DONATED MY KNEES TO ROLLER DERBY" with a retro roller skate illustration. The design combines shades of pink and navy blue, making it a fun and eye-catching statement piece. The shirt appears to be made of soft and comfortable cotton, perfect for everyday wear or showing your support at the rink. Whether you're a skater yourself or a dedicated fan, this t-shirt is a great way to express your love for the sport and add some humor to your wardrobe.