Breast implants themselves don't get cold. Once an implant is placed, it sits inside the body surrounded by tissue, muscle and blood flow, all of which keep it at core body temperature no matter what the weather is doing outside. Saline doesn't freeze until the high 20s Fahrenheit, and silicone gel needs temperatures far below anything the human body will ever reach, so there's no real mechanism for an implant to "hold" cold. What patients are usually noticing is a normal skin response called vasoconstriction. In cold weather, blood vessels near the surface of the skin narrow to conserve heat for the body's core, and the chest and breast skin can feel cooler to the touch as a result. This happens to natural breast tissue too, but it can feel more noticeable after augmentation because patients are paying closer attention to that area. It's a surface phenomenon, not a sign of anything wrong with the implant or its position. If the sensation is accompanied by pain, unusual firmness or color changes in the skin, that's worth having evaluated. Otherwise, this is a normal, harmless response to cold.