The beauty of silicone is its flexibility and malleability. A rubber-like material, it can easily be moulded to form and then fits tightly over the phone. Silicone skins are made for specific phone models for the best fit and appearance. This also ensures that holes for buttons and ports for connections and cables are in the right places. Because silicone wraps around the phone like a glove, these types of covers are extremely slimline and low profile, which only enhances the natural slender appearance of modern phones. They are not bulky or heavy in any way. Silicone covers are also easy to put on and remove, making them extremely convenient. The tight fit and low profile makes silicone cases easy to slip into a pocket or small purse and carry around discreetly. This makes them popular for taking on holidays, out clubbing, while exercising and similar situations.