Our performance products are battle-tested and approved by professional athletes.

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Every day is day one®.

“May our day one® performance apparel serve as a call to embrace every challenge you face and push your boundaries to a new level. You vs. you – the ultimate race.”
– Arda Saatçi, Founder

Welcome to day one® – the brand that embodies the daily battle against yourself.At day one®, we believe: Every day is day one. Every day is day one®. You are not bound by what you were yesterday; every morning, you get to decide who you are. It’s not the race against others that matters – it’s the race against yourself – you vs. you. Our performance products are tested by professional athletes and made for extreme challenges. We are a brand by athletes, for athletes. Whether you’re on the road, in the gym, or tackling your daily life.Founded by Arda Saatçi, an athlete who pushed his body and mind to the ultimate limits. His 3,000 km ultramarathon from Berlin to New York symbolizes the very philosophy of day one®. This run was more than just a physical challenge – it was a daily victory of the mind over the impossible.

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