Cotton-polyester thickened warm silk air layer fabric is an innovative functional fabric. By adding elastic yarn or metal wire to the interlayer, the support and warmth of the fabric are significantly improved. This unique design enables the fabric to provide additional support while maintaining good breathability, making it suitable for making clothing and supplies that require support and warmth. The addition of elastic yarn or metal wire not only enhances the elasticity and comfort of the fabric, but also effectively maintains body temperature in cold environments and prevents the invasion of cold air. Cotton-polyester thickened warm silk air layer fabric is suitable for products such as children's warm clothing and waist and knee pads. In children's warm clothing, it can provide excellent warmth, and because of its good elastic design, it will not restrict children's freedom of movement. The support of this fabric makes it an ideal choice for making waist and knee pads. The addition of metal wire or elastic yarn can provide effective support for the waist and knees, reduce pressure during exercise or long-term activities, help relieve fatigue and avoid injuries, and is especially suitable for sports enthusiasts or people who need extra protection.