Josh Kerr shattered the men's outdoor mile world record on Saturday in London, clocking 3:42.66 at the IAAF Diamond League meeting. The Scottish runner's performance, fueled by a custom Brooks shoe and speed suit, highlighted how biomechanical precision and brand collaboration can rewrite athletics history. Main Developments Kerr's 3:42.66 finish broke the previous record of 3:43.13, set by Morocco's Hicham El Guerrouj in 1999—a mark that had stood for 27 years. The 28-year-old wore a custom Brooks Hyperion 222 spike, designed specifically for his biomechanics, including his unique foot strike, asymmetrical push-off, and demand for an ultra-aggressive ride. Brooks also outfitted Kerr in a speed suit crafted to enhance aerodynamics and breathability. The suit features laser-cut perforations that release heat and humidity while improving mobility, complementing the shoe's aggressive design. Read also: Why Deloitte's New Tool Translates Sustainability into Finance Background The shoe's name, Hyperion 222, references Project 222—the joint campaign between Brooks and Kerr aiming to break the outdoor mile record. The number 222 represents the seconds by which Kerr beat El Guerrouj's 1999 time: 3:42.66 versus 3:43.13. Brooks developed the Hyperion 222 using its Run Research Lab and Finite Element Analysis (FEA) data, tailoring every aspect to Kerr's stride. The brand has been on a strong trajectory, reporting double-digit growth in the first quarter of 2026 and calling it the strongest quarter in company history after a record-breaking 2025. Why It Matters Kerr's record comes less than three months after Adidas athlete Sebastian Sawe broke the marathon world record in London, finishing under 2 hours. Though the mile is not included in Olympic competitions, it has become a major focus for running brands in recent years—highlighting how shoe technology and athlete-specific design continue to push human performance boundaries. The mile remains a benchmark for speed and endurance, and Kerr's feat underscores Brooks' growing dominance in the competitive running market. Kenyan runner Faith Kipyegon nearly made history in Paris last summer in her attempt to run a mile under 4 minutes, though she broke her own world record at 4:06:91. What's Next With the outdoor mile record now set at 3:42.66, attention will shift to whether other athletes—potentially those sponsored by rival brands like Nike or Adidas—can challenge the mark. Brooks will likely leverage Kerr's success to further expand its presence in elite track and field, while Kerr himself may target additional records or Olympic events.