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Gear Review: Smith I/OS Goggles

With interchangeable lenses and a rimless design, these goggles are great for a variety of conditions.

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Gear Review: Smith I/OS Goggles

The problem: No one lens suits all light conditions, and buying multiple goggles for overcast and bluebird days demands a mountain of coin. The solution: The I/OS, which comes with two easily interchangeable lenses (the Sensor Mirror for flat light and the Ignitor for bright sun). The rimless design simplifies the swap: Just flip up the two plastic clips on top and pop out the double lens.

The double-lens construction is another plus; it foils fog-ups with two layers of optics sealed with silicone and a pin-size porthole near the strap that vents moisture that might accumulate between the layers. The system let our tester wear the I/OS during moderate uphill hikes that would’ve steamed up most goggles, and both lens options provided sharp definition in all conditions. Best for small- to medium-size faces. $180; 4 oz.; smithoptics.com