Proton Mass Dark T-Shirt Does This Proton Make My Mass Look Big?: Quite possibly the geekiest joke ever. You're guaranteed to get groans (and maybe old fruit thrown at you) when you wear this shirt. Product Information Not too tight, not too loose. Fabric Thickness: Look cool without breaking the bank. Our durable, high-quality, pre-shrunk 100% cotton t-shirt is what to wear when you want to go comfortably casual. Preshrunk, durable and guaranteed. - 5.6 oz. 100% cotton
- Standard fit
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