- Size: 42 • Upper material: fluffy fleece that provides thermal support and comfort. • Inner material: synthetic with memory foam insole and fleece surface for a soft and comfortable feel. • Sole: non-slip EVA sole, lightweight and comfortable, ideal for prolonged use. • Variety: two types of use available, easy to put on and take off. • Shoe width: normal. If your feet are wide or thick, it is recommended to choose a larger size. • Product measurements: 3 cm wide, 3 cm high, and 5 cm long.