Flex Friday the 13th

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Flex Friday the 13th Bad luck.Big arms. Flex Friday the 13th is a horror-gym parody for lifters who embrace the spooky side of strength. Featuring a masked, machete-era menace reim agined as ridiculously jacked, this design blends classic slasher vibes with unapologetic flex energy. It’s dark. It’s absurd. And it’s for anyone who treats Friday the 13th like just another day to lift heavy and scare the barbell into submission. Soft, gym-ready, and made to order, this tee is perfect for late-night workouts, spooky season, and unsettling everyone just a little. No running.No hiding.Just flexing. Show more