Our bestselling 72-Hour Hoodie is cut from a merino wool blend that’s naturally thermo-regulating, moisture-wicking, and odor-resistant. This “Tactical” version takes those properties and doubles down on durability, infusing the specialized fabric with Spectra®—a fiber 15x stronger than steel that’s used in everything from body armor to performance sailing lines. That means the hoodie not only stays fresh after more than three days of nonstop wear but can also hold up to the most rigorous efforts.