The Circadian will keep you secure and in tune with the earth’s natural rhythms—at every step. The minimalist nature of Earth Runners sandals offers a gentle reminder to yourself–and others–of the oneness you share with the Earth. The Performance laces featured on the Circadian Adventure sandals provide ultimate security and longevity on all of your adventures. Weight: 5.9 oz (single sandal, men's 9 / women's 11) Thickness: 7.5mm outsole + 1.5mm footbed = 9mm Sole: Vibram® Gumlite Outsole (Domestically Sourced) Footbed: Earth Grip Moisture-wicking Canvas GOTS (Organic) Certified Small Batch Dye Laces: Performance laces provide ultimate security and longevity on all of your adventures, while the thinner & more flexible Lifestyle laces are ideal for maximum comfort in casual everyday life.