This Solid Love dildo is a ribbed dual density dildo. The core is filled with Silexpan, the exterior is made of premium phthalate free silicone. This dual density makes the interior firm and the exterior soft, for realistic experiences. And the dildo is thermo reactive, which means it gets harder when cooled in the fridge or cool water and softer when warmed in the microwave or hot water. Great for temperature play! Length 18 cm, width 4 cm.