<p>In this study, we examine the effects of a ventilated vest worn under a ballistic vest on thermophysiological and perceptual outcomes during an intermittent activity.&#xa0;Eight male soldiers (age:21 ± 2 years, height:184 ± 8&#xa0;cm, weight:77.5 ± 10.1&#xa0;kg) performed an intermittent 50-10-20–10&#xa0;min walk-rest-walk-rest treadmill protocol in a climatic chamber (32˚C, 33% relative humidity, 5&#xa0;km/h walking speed). Two conditions were evaluated: control (clothing + ballistic vest) and ventilated vest (clothing + ventilated vest + ballistic vest). Local static thermal insulation and evaporative resistance of the control condition were (0.485 m²KW⁻¹ and 176 m²PaW⁻¹) and for the Ventilated vest configuration (0.242 m²KW⁻¹ and 38 m²PaW⁻¹). Heart rate (HR), core temperature (Tc), mean skin temperature (Tsk), and thermal perceptual scores were collected.&#xa0;Compared with the control condition, the ventilated vest resulted in an attenuated increase in Tc (-0.3 ± 0.2&#xa0;°C, <i>p</i> = 0.008) and faster HR recovery (-9 ± 12 BPM, <i>p</i> = 0.009). Moreover, significantly cooler thermal sensation and significantly lower thermal discomfort were observed in ventilated vest vs. control conditions (<i>p</i> &lt; 0.034).&#xa0;A ventilated vest has the potential to facilitate a faster cardiac recovery during an intermittent walking protocol in dry-warm environment. The findings of this study contribute to our understanding of potential use of ventilated vests in high-performance settings and offer practical applications in military and occupational contexts.</p>