In addition to the pad (which varies in shape, density, construction, and materials; Elastic Interface Technologies are superlative) and to Lycra weight, other factors contributing to cost are the variety of materials used and construction techniques. For example, patterns which use more panels require more complex shaping but allow greater opportunity for materials selection best suited to needs in that area, such as trading off breathability or lightweight for support, insulation, amount and direction of stretch, or durability. Construction techniques can vary the quality and type of stitching and joining, or employ different techniques like seam welding. Detailing, like logo placement, complicates construction adding cost, as do features like pockets and colors selection.