It depends what style bra you are designing, but powernet is best used for the wing this is a very sturdy knit fabric and breathable with high elastane content. This allows the fabric to conform to the body providing control and support. Eighty percent of breast support should come from the underband, so by using powernet you have the strongest support possible without having much stretch or distortion, which prevents loss of support through wearing. For a list of international fabric suppliers there is a complete list in the book 'The Anatomy of the bra'.