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Far Infrared Long Underwear



Our far infrared long underwear (long johns) not only keep the body warm on a cold day but can also reduce muscle fatigue, help relieve pain, improve circulation, and quiet restless leg syndrome.

ThermoFlow® long johns are made using a nano-technological process that incorporates fine ceramic particles in the polypropylene thread used to weave the light weight fabric used.


ThermoFlow® long underwear has been found to:

  • Provide a feeling of overall warmth in cold temperatures without inducing sweat.
  • Improve circulation in the legs, thighs and hips.
  • Relieve stiff muscles such as tight hamstrings, calves or glutes.
  • Aid in recovery of strained quadriceps, pulled hips, or cramped stomach muscles.
  • Reduce swelling during sports like hockey, skiing, running, or personal workouts.
  • Extend muscular endurance and performance.
  • Alleviate pain associated with rheumatism, arthritis, and bursitis in the hip joint.
  • Reduce night-time leg and hip cramping, muscles spasms, and restless leg syndrome.

Wear ThermoFlow® long johns under workout gear, during winter activities, or as pyjamas at night.


Description Small Medium Large X-Large
Long Underwear Size of Waist
26"- 28" 29"- 32" 33"- 38" 39" - 44"
(66 - 71 cm) (74 - 81 cm) (84 - 97 cm) (99 - 112 cm)