Will Dunn owes his life—and maybe his marriage—to his REI Co-op Half Dome tent. “The tent was a gift from my now-in-laws before we were in-laws,” he says. “It was my first backpacking ...

REI Co-op’s bestselling Half Dome tent line hits a midlife milestone this year. For 45 years, Half Dome tents have evolved with technological advances and design input from Co-op members.