BugBrush is comprised of 5 individual segments which are connected with a plastic secure hinge, once fixed together the joints are then secured further by a flexible thermoplastic elastomer (the white bit). The way BugBrush is engineered is that these segments are like shock absorbers, in the same way as adult toothbrush neck flexes, BugBrush allows for a 5 degree give in these joints so that when the child uses it, it’s a more ergonomic experience. The joints withstand 90 Newtons of force which is what is required for EN71 mechanical testing. Adults are very easily able to exert more force then this on the joints and break it, please do not be tempted to excessively bend the product.