A device for controlling the breakover rate of a seatback , comprising: at least one bracket rigidly attachable to a seatback of a seat , the at least one bracket including at least one opening configured to accept at least one pin fixed to the seat and capable of transmitting a breakover energy associated with the seatback and corresponding to a dynamic event, the at least one bracket including at least one breakover control element (118, 128, 136, 140a-c, 120, 130, 142a-c) extending into the at least one opening and configured to optimize a velocity differential between a breakover velocity of the seatback and an impact velocity, the breakover velocity associated with the dynamic event and the impact velocity associated with at least one object impacting with the seatback during the dynamic event, by engaging with the at least one pin to at least one of a) restrict the breakover velocity and b) absorb at least a portion of the breakover energy, characterized, in that the at least one breakover control element (118, 128, 136, 140a-c, 120, 130, 142a-c) comprises: at least one first breakover control element_(118, 128, 136, 140a-c) configured to engage the at least one pin by deforming in response to the at least one pin ; and at least one second breakover control element (120, 130, 142a-c) configured to engage the at least one first breakover control element (118, 128, 136, 140a-c) by deforming in response to the deforming of the at least one first breakover control element (118, 128, 136, 140a-c). at least one bracket rigidly attachable to a seatback of a seat , the at least one bracket including at least one opening configured to accept at least one pin fixed to the seat and capable of transmitting a breakover energy associated with the seatback and corresponding to a dynamic event, the at least one bracket including at least one breakover control element (118, 128, 136, 140a-c, 120, 130, 142a-c) extending into the at least one opening and configured to optimize a velocity differential between a breakover velocity of the seatback and an impact velocity, the breakover velocity associated with the dynamic event and the impact velocity associated with at least one object impacting with the seatback during the dynamic event, by engaging with the at least one pin to at least one of a) restrict the breakover velocity and b) absorb at least a portion of the breakover energy, characterized, in that the at least one breakover control element (118, 128, 136, 140a-c, 120, 130, 142a-c) comprises: at least one first breakover control element_(118, 128, 136, 140a-c) configured to engage the at least one pin by deforming in response to the at least one pin ; and at least one second breakover control element (120, 130, 142a-c) configured to engage the at least one first breakover control element (118, 128, 136, 140a-c) by deforming in response to the deforming of the at least one first breakover control element (118, 128, 136, 140a-c). at least one first breakover control element_(118, 128, 136, 140a-c) configured to engage the at least one pin by deforming in response to the at least one pin ; and at least one second breakover control element (120, 130, 142a-c) configured to engage the at least one first breakover control element (118, 128, 136, 140a-c) by deforming in response to the deforming of the at least one first breakover control element (118, 128, 136, 140a-c). <EOS>