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Bra design has had little innovation over the past 100 years, and until now, no one has addressed the issue of breast weight from a physics and engineering perspective. We set out to change all that and revolution the lingerie industry in the process.

We began our research and development by identifying pain points often associated with traditional underwire bras, looking specifically at the issues faced by women with fuller busts. These include:


  • Pain, strain and dents in the back and shoulders
  • Pain and discomfort on the torso
  • Chafing and rashes


Thinking About Breast Weight from a Scientific Standpoint

Breast weight is just another mass that needs to be supported, and the same engineering principles used to support bridges and architectural structures can be applied to bra design. After looking at a variety of architectural structures and bridges, we zeroed in on the truss, which is not only the basis of our design, but also the inspiration for our name.

Trusses are a series of triangular shaped structures that connect to help distribute weight across a broader area, as opposed to a single point. This feature was especially useful in designing the patent-pending BAST™ (Breast Advanced Support Technology) system, because redistributing breast weight over a broader area was key in reducing the strain on the shoulders and back.

We combined the aspects of trusses with those of a cantilever system to create the BAST system. A cantilever includes a structure that projects from a fixed point. In Trusst bras, the supporting structures are cantilevered from fixed points on the torso, directly under the bust.


How the BAST™ System Provides a Better, More Comfortable Support

For larger busted women wearing traditional underwire bras, the breast weight often ends up being supported by the shoulder straps, which is what causes the back pain and shoulder dents. The BAST system redistributes the breast weight to the core - the strongest part of the body, thus relieving the strain on the upper body. With less strain also comes less shoulder dents and better posture. Without a rigid underwire, our bras also eliminate the discomfort caused by wires poking out of the bra and digging into the skin. The BAST system inside each Trusst bra is made from a plastic material that is flexible enough to conform to the body but sturdy enough to support the weight of the breasts. In addition, the structure is completely encased in foam cups so there is no fear of it popping out.



A High-Tech Bra Needs a High-Tech Fabric

We teamed up with GARMATEX to line the cups with a fabric as high-tech as the BAST system. GARMATEX Kottinu™ fabric is an engineered cotton-like fabric that features wicking and antimicrobial properties and lasts up to six times longer than cotton. Keeping breasts dry and comfortable is key to minimizing rashes and chafing.



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