If you replace your current t-shirt with another t-shirt, is it still the same t-shirt? Well no, they're objectively different objects. But that won't stop you from raising philosophical brain-teasers with your friends and family against their will with this subtly indicated image of Theseus' ship.
 
The shirt is a Comfort Colors heavyweight cotton t-shirt. Quite high quality. I chose them because I like those shirts myself.
 
The design is high-quality transferred to the shirt with a professional heatpress outfit.