Instant Cooling for Pain Relief The removable, re-freezable ice roller on the foot massager provides immediate pain relief, especially for acute plantar fasciitis sufferers. The foot ice pack roller uses cold therapy to effectively reduce swelling, inflammation, and pain. Recommendation: When freezing the ice roller in the freezer, don't exceed a freezing time of 2 hours at 0 F (-18 C). Plantar Fascia and Acupressure The two massage rollers on the foot reflexology tool are crafted from high-quality, skin-friendly silicone that is comfortable to the touch and safe to use. They are designed to massage the plantar fascia and acupoints on the soles of the feet. When used together, they can effectively relax muscles, promote blood circulation, relieve stress, and improve foot health.