LoFric is the only catheter in the world with Urotonic™ Surface Technology. This method has been developed to make bladder emptying easier and more gentle. The secret behind Urotonic Surface Technology is a chemical process that makes the surface ’isotonic’ to urine. This means that the salt content on the catheter's surface is the same as in your urine. This salt content makes the water on the moist surface stay there during the entire catheterization procedure. It’s why LoFric catheters are just as slippery coming out as they are going in.