Urb carts are vape cartridges that contain a concentrated form of cannabis for vaporization. They are designed to be used with a vape pen or battery and contain a heating element that turns the concentrate into vapor for inhalation. These cartridges come in a variety of flavors and potency levels, making them a popular choice among cannabis users. Some users have reported varying effects on heart rate after using Urb carts, with some experiencing an increase and others a decrease. The brand Urb Delta is known for its high-quality and potent cartridges, making it a favorite among enthusiasts.