Polyester lycra stretch mesh and polyester microfiber upper. Bungee speed lacing system allows for easy on and off, and a snug fit. Soft lining offers a great next-to-skin feel. Lightly padded, 2 mm EVA insole features properties for a fresher in-shoe fee. Lightly padded, 2 mm EVA insole features properties for a fresher in-shoe feel. 4 mm EVA midsole provides lightweight cushioning and shock absorption. 2.5mm Vibram® rubber outsole features the following technology. • Vibram® VI-LITE features the ultimate in lightweight, shock absorption cushioning, for maximum energy conservation. • Vibram® XS RUN provides a maximal stable hardness across a broad temperature range and the softness of the compound allows for expansive ground contact and grip across lug surfaces. XS RUN also provides high grip on smooth surfaces. • Vibram MONT® compound formulation is optimized for mountaineering, trekking, acrobatic, works and motorbike racing. MONT is used to conquer the highest peaks in the world by offering the highest reliability on the most difficult terrain at low temperatures. Wore them in the house for about an hour so technically not unworn but pretty darn close! No box :)