With a durable synthetic and breathable mesh upper, and a waterproof GORE-TEX® XCR® membrane, the Hedgehog shoe keeps your foot cool, dry, and comfortable. The X-2 O2™ heel air pod lends cushioning, while the lightweight Vibram® outsole delivers traction on all types of terrain. An ergonomically-designed Northotic® footbed enhances stability and support, and inhibits odor and disease-causing bacteria. The gusseted tongue provides protection from debris.