Adaptive-compliance smart material based interactive bra technologies provide optimal protection during prolonged usage periods. The new bra consists of special fabrics embedded into the bra's cups and straps which generate feedback information for "just-right" automatic compression adjustment in real-time.

The breast compression can be provided either through activating the cup part of the bra, or the shoulder and chest straps, or both. In the first configuration the middle part of the bra is made of a 2-way constrictive woven substrate that shortens and narrows upon activation. This causes the bra to shift up while applying compression to both breasts. The lower part is also activated concurrently with the middle part to prevent breasts from sagging. In the second configuration, a combination of one-way and 2-way constriction straps built into the shoulder straps and cups are used, respectively. Depending on which strap is activated, the breasts can be shifted up, or to the sides while undergoing compression. The straps' activation logic can be adaptively controlled to achieve the desired shifting, reshaping and compression of the breasts. After termination of physical activities, the activation/compression can be either alleviated or switched off, allowing the bra to return to its initial relax-fit settings.

Power requirements for the interactive bra depend on the total active use duration, which is determined by the type of activities undertaken: walking, racing, jogging, etc. During light activities, or for small-size bras, a small number of active straps/inserts is required. During extreme applications where all constriction straps are activated, the available operation time depends on the battery type. Novel soft bendable batteries will be used. Energy efficient active materials such as ESI's dielectric elastomer actuators and HASCO (Heating-Actuation-Sensing Composite) fabrics would further improve the battery lifetime.

Following the introduction of smart bra technology and products, other similar products are under development, such as men's variable-compliance sport underwear that may prevent testicular cancer in bike riders and provide other definitive advantages.