1.factory outlet 2.OEM Service 3.Customized Color,size, package,logo 4.Sample is free 5.CE certified, featureFleeced insoles keep your feet warm and comfortable Aluminum foil repels the ground coldFelt is smooth, light and water-resistant CFC-free, ozone friendly, recyclableTech SpecsMaterial: Aluminium foil, PE and FeltSize: as per customer request2 years guarantee