Designed for demanding activity but completely at ease with wearing casually everyday SUSTAINABLE | LIGHTWEIGHT | BREATHABLE | DURABLESize and Fit Customer say fits true to size, you may stay at your usual size. About Vibe 2Flyknit upper with comfy lining for all day comfort with or without socksReBound energy return insole plus UrbanGrip outsole gives excellent ground feel with shock absorptionHighly breathable for when the tempo speeds upUpper Bottle-breathable, durable, moisture moving mesh, made from recycled plastic bottles. Conventional lace. Lining Unlined for complete breathability. Insole ReBound 4 mm: energy return with ground connectivity to allow full natural movement. Ideal for performance on harder surfaces and longer distances. Midsole SoftFlex: fully flexible for maximum foot movement. Outsole UrbanGrip: 3.0 mm wide-area tread for optimum grip and durability on urban surfaces. Waterproofness Not waterproof, highly breathable. Use a waterproof sock for cold / wet conditions. Weight 585 gms size pair 42. Stack Height 10.5 mm with insole; 6.5 mm without insole, zero drop. Care Hand wash with luke warm water and mild detergent. Air dry. We do not recommend putting your Freets in the washing machine or dryer.