The Arsenal Thermo R Vent Stadium Jacket designed in grey with yellow detail. Using the brand new thermo regulation system from Puma, this Arsenal Jacket will keep your body temperature optimised in all climates. When wearing the jacket during exercise, the vents will open with your motion to let cool air in and warm air out. This new system will regulate your body temperature and allow you to train harder. The new Thermo R Vent system also keeps your body warm when static. The vents will detect the limited motion and close up to keep the cool air out and retain the warm air keeping your body at the optimised temperature. Keeping your body regulated in colder seasons is important when exercising, and this Arsenal Stadium Jacket is leading in the industry. New vent technology to regulate body temperatureCool air in, warm air outVents open with body motion Product code: M75073802