1, contact underwear NudeBra is a kind of underwear, commonly known as contact bra, which consists of two pieces of silicone and a front button-you don't need a shoulder strap and a back button, but you use the natural viscosity of silicone to stick it tightly on your chest and then buckle it up to form a concentration.

2, material: invisible bra cups can be divided into two layers, the inner layer is close to the skin, is sticky, the quality of stickiness is directly related to the glue used in the inner layer. The outer layer is not sticky, and the material mentioned here refers to the material of the outer layer of the cup.