Patrick Mahomes' helmet served its intended purpose despite cracking and a piece breaking off in subzero temperatures during Saturday night's playoff game, per the manufacturer.

"While outer shell damage is not ideal, the ZERO2 helmet did its job of protecting Patrick Mahomes during a head-to-head impact during unprecedented cold temperatures," VICIS said in a statement released on social media.

"The exclusive multi-layer technology employed in the VICIS ZERO2 helmet model utilizes a deformable outer shell, RFLX impact absorption layer, followed by a stiff inner shell. This design approach is similar to the crumple zone of modern cars, effectively absorbing and dispersing impact forces at the point of contact.

"Extreme conditions like those experienced in Saturday evening's NFL playoff game are bound to test the limits of even the highest performing products."

A piece of Mahomes' helmet broke off as he was being tackled during the victory against the Miami Dolphins. The temperature in Kansas City at kickoff was minus 4.