The O FIT Insole® Plus II Thermal features all the same updates as the O FIT Insole® Plus II (Cleansport NXT odor control, cushioning pods updated with Poron Vive for fatigue mitigation, as well as our Adaptive Cushioning Technology in the forefoot) with the addition of a Mylar bottom coating to reflect the heat from your feet. Pop a pair into your favorite footwear and feel the warmth and comfort.