A tech pack, also known as a technical specification sheet, is typically created by a fashion designer or a product development team. The designer or team is responsible for developing the design and technical specifications for a product, which are then compiled into a tech pack. The designer or team may work in-house for a fashion brand or manufacturer, or they may be contracted by a fashion brand or manufacturer to develop the product design and tech pack. In some cases, fashion brands or manufacturers may use specialized tech pack software to create their own tech packs in-house, rather than hiring a designer or team. The information included in a tech pack can vary depending on the product and the needs of the manufacturer. In general, a tech pack includes detailed information about the product's design, materials, measurements, and construction requirements. A well-designed tech pack is an essential component of the product development process, as it ensures that all parties involved in the manufacturing process have a clear understanding of the product's requirements and specifications.