UMP-45 | Warm Blooded was added to the game on January 21, 2026, as part of The Harlequin Collection, released with the Fourth Season update. The skin was created by Valve.
Most of the submachine gun's body is covered with a dynamic animal pattern in warm beige and orange tones. The design combines elements resembling zebra and tiger stripes, jaguar spots, snake scales, and other animal prints. Some parts of the body are painted solid brown, while several smaller details of the weapon remain unpainted. The placement of the pattern on the weapon's body depends on the pattern index.
The skin's Float Value ranges from 0.00 to 0.70, which makes UMP-45 | Warm Blooded available in all exterior conditions. The first minor abrasions appear on the painted parts of the body in Minimal Wear condition and become clearly noticeable at approximately 0.09. As the Float Value rises, abrasions increase in number and size. At the highest wear levels, a significant part of the paint is worn away, and the animal pattern becomes almost unrecognizable.
The pattern index affects the skin's appearance. The community highlights several notable pattern variants, including Zebra (#388, #410, #462), Tiger (#5, #135, #369), Turtle (#50, #65, #75), Jaguar (#133, #147, #297), and Snake Scales (#96, #211, #232).
The quality of UMP-45 | Warm Blooded is Mil-Spec Grade. The skin is not available in a StatTrak version. Its design is similar to M4A1-S | Party Animal and SG 553 | Safari Print from the same collection.
