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10. Icebug Heros, $119; Icebug’s Trail BUGweb ($24.95)

Water-resistant trail shoe with a dual-density midsole provides stability for pronation control. Grooves cut into the outsole work compatibly with Icebug's Trail BUGweb, a rubber web with six tungsten carbide studs built-in. Heros: 12 ounces (men's 9); 9.9 ounces (women's 7); Trail BUGweb (3 ounces/pair).

Pros: With or without the Trail BUGweb, the Heros is a cushioned, stable trail shoe. The Trail BUGweb slips over the shoe and fits seamlessly into the grooves of the outsole, providing traction with six tungsten carbide spikes. When taken off, the Trail BUGweb is the smallest, lightest weight and most minimalist traction system to carry on the run. And the BUGweb does work with other shoes.

Cons: The Trail BUGweb takes some finagling to fit perfectly into the grooves of the outsole, and the shoe is slightly heavy. While the BUGweb works worn over any shoe, it can feel a bit "bumpy" underfoot when not sitting perfectly in outsole grooves, but only when running on hard surfaces. Carbide studs don't retract like they do on Icebug's BUGrip shoes.

Tester says: "This is a solid, comfortable trail shoe with the huge bonus of the BUGweb adding great traction on ice, and transforming back to a trail shoe without spikes. It's a really versatile system that works great. This has become my favorite set-up."