Non-wired, a 2 size reduction effect. T-stitches that support the chest from the bottom, adjustable straps that don't come off. Adjustable hooks. This product has 83 Polyamide 17 Elastane container 92 Polyester 8 Polyamide. The diagonal straps that go under the bust and the T-stitches on the chest add extra form to the chest by 2 sizes. Thick and sturdy straps distribute the chest weight evenly. Non-wired structure. It allows freedom of movement and the lace details give it a stylish lookPolyamide. It is the first synthetic fiber produced. It's durable. Suitable for long-term use. Polyester is a flowing and light fabric. It's durable, flexible, and shiny. Elastane Flexible Suitable for long-term use, wraps the body and maintains its shape Care Instructions.