Road cycling is a sport characterized by long, high-intensity training sessions. Cyclists train and compete in varying temperatures, which can affect their performance. Therefore, thermoregulation is a fundamental capacity in endurance sports such as cycling. Far-infrared (FIR) emitting fibers have recently been used in garments during and after exercise to modulate thermoregulation and enhance muscle recovery. Every competitive cyclist voluntarily underwent testing at a temperature-controlled laboratory after reading and signing the informed consent document. Participants were invited to three separate sessions at the laboratory. During the first session, essential personal information (name, surname, sex, age, height and weight) was recorded. In addition, an incremental test was performed on a cycle ergometer to measure VO2Max and ventilatory threshold 1 (VT1). Subsequently, they were randomly divided into two conditions: an experimental garment (EG) with FIR and a control garment (CG). Each test session consisted of 40 minutes at VT1, followed by a 5-second sprint at the end. During the test, various physiological parameters were assessed: Oxygen consumption (VO2), heart rate (HR), blood lactate, body temperature (skin and core temperature), and sensations of exertion and sweating.