It was a horrible sight when Jamal Musiala fainted during Bayern Munich’s 3-1 pre-season win over RB Leipzig, collapsing minutes after scoring in 33°C heat.
The match which took place in Bayern’s home, Allianz Arena, was part of Telekom Cup, an off season friendly competition held since 2009.
New signing Ismael Saibari interpreted the situation correctly and caught Musiala before he fell. Eventually the youngster was able to walk off under his own power.
While his teammate suffered an unfortunate incident due to the ongoing summer heatwave in Germany this week, it was an odd sight to see Michael Olise wearing a black vest in the stands.
Fans were left confused as photos of Michael Olise sitting on the gallery sitting in what looked like a heavy jacket or vest while temperatures climbed well past 30°C.
Teammates around him, including players like Harry Kane, stayed in standard short-sleeved training gear, which made Olise’s outfit stand out even more.
At first glance, the outfit looked like nothing more than an odd fashion choice, or a player who simply felt the cold despite the heat.
But the backview of the jacket Olise wore offered a more practical explanation: that Olise wasn’t wearing an ordinary jacket at all, but a piece of cooling equipment designed specifically to manage body temperature during long periods of inactivity in the heat, such as sitting on a bench for an extended stretch of a match.
The item worn by Michael Olise is an Air Cooler Vest, which features integrated portable battery-powered cooling fans built directly into the lower back fabric to circulate air and lower body temperature in hot weather.
This type of vest runs on a small 5V brushless fan connected to a portable battery, keeping the wearer cool with quiet, sub-40db airflow. The fabric is lightweight, breathable, and machine washable, built for long wear in the heat.
Olise’s vest, mocked at first, now looks like a sensible response to the heatwave conditions, not a fashion choice.
