The short answer here is no, a wireless bra will not make your breasts sag.
The long answer is that underwire is actually in a bra for shape, not support. It is not their to lift your breast, or stop your breast from bouncing, but rather to create a “natural” round shape. As you’ll know from experience as soon as you take an underwire bra off your breasts revert to their actual shape and position.
The real cause of our breasts sagging is due to the weak natural support structures in the breast, that being the coopers ligaments and the overlying skin, that once damaged cannot be repaired. So as we age our skin loses its elasticity and this will result in our breasts changing position or “sagging”. There are lots of other factors that cause our breasts to sag, not just ageing, which include smoking, drinking, sun exposure, genetics, hormonal changes, weight gain, pregnancy, lactation and weight loss.
👉🏽 Read our ‘5 best bras for after breast reduction surgery’ blog