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.