Thick and sturdy straps distribute the weight of the chest evenly. Non-wired, a 2 size-reducing effect T-stitches that support the chest from the bottomAdjustable non-sticking strapsAdjustable hook-ups This product contains 83 Polyamide 17 Elastane container 92 Polyester 8 Polyamide The diagonal straps that go under the chest and the T-stitching on the chest add extra form to the chest by 2 sizes.