Kai Heerings (born 12 January 1990) is a Dutch professional footballer who plays as a centre-back for Ajax Amateurs.

[1] Heerings signed a one-year contract with SC Cambuur in May 2015, with an option for another season, as he was set to replace the outgoing Lucas Bijker.

[2] However, he only made five appearances for the club, before being sent on a six-month loan to Helmond Sport in the second-tier Eerste Divisie for the remainder of the 2015–16 season in January 2016.

[6] In September 2019, after his contract with Fortuna expired, Heerings committed to Indian Super League club NorthEast United for two seasons.

The product was inspired by Heerings' own experiences of boredom when travelling for football matches, and the case has proved popular among professional athletes.