A warming cell pattern is provided that may be arranged on an interior portion of a garment or other outdoor equipment to improve the warming qualities of the garment or equipment. The warming cells may take on a number of shapes, sizes, and patterns, but they are preferably cube-shaped and arranged in a "running-bond" or offset brick-like pattern so that vertical and horizontal channels are formed between adjacent cells. When the garment is worn or the equipment is used, an air-filled space may be formed by the channels and the user's body. Because air is a strong insulator, the air-filled pockets retain heat so that the jacket or garment including the warming cell pattern will have improved warming properties.