After I fell once with my first helmet, it looked fine on the outside and it seemed that all these talks of needing to replace it after a fall are rubbish. Still, I were in for an experiment, so I took it apart to see what's inside. The material there was webbed with small cracks... Then I got curious, how would it last after another hit - placed it on the ground and asked my horse to kick at it (he's trained to kick a ball as a trick). The web of cracks quickly turned into a huge opening in the inside materials. No questions any more, replacing helmet after each fall... I'm a huge fan of Tipperary Sportage, very light, comfortable and ventilated.
I have come a long way, to surrender my shadow to the shadow of my horse.