Cohesive gel implants have been in use in England since 1995. Thes are silicone implants that are filled with a thicker material than standard runny gel implants. If you cut into a standard gel implant, the runny silicone escapes like runny hunny. This would be completely undesirable in real life as the silicone gel escapes into the surrounding space. In contrast when you cut into a cohesive gel implant, the implant itself maintains it shape and integrity as the high cohesive gel is rather similar to the inside of a jelly baby xx