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Most cold-weather athletes know that staying dry is essential to regulating your core temperature as you run, and that temperature regulation is essential to performing well. The Pearl Izumi Therma Phase Top features soft, synthetic fabric that wicks moisture from your body, allowing you to maintain your warmth, while a brushed interior feels smooth against your skin and provides additional warmth. The raglan sleeve construction allows for optimal mobility, a front zipper provides temperature control, and a back zipper pocket offers secure storage while you run.


  • Black/Fairway (3TC)
  • True Blue (30W)



  • Approx. 10" zip with windflap and color contrasting zipper
  • 2" mock neck
  • Raglan sleeve construction for optimal range of motion
  • Brushed interior for added warmth
  • Back zipper pocket (6" zipper, 6.5"W x 7"H)
  • Reflective branding and details for increased visibility


  • SELECT Thermal Fleece: Body (100% Polyester), a moisture-wicking fabric with soft, brushed interior for thermal properties

Customer feedback

Comments: Male runner, 6'1, 180lbs, ~25-30M/week. High quality fabric, very soft, thicker than expected thus very warm. Also top-notch construction. I wore this PI long sleeve top in my last two 10M runs where it was ~30-40oF. I had a Mizuno Breath Thermo stretch underneath. Kept me warm from start to finish. Excellent to transfer sweat away from skin. Some wind and I never felt cold, so this top provided a little bit of wind protection, mainly due to the fabric thickness. IMO, this top can be worn as a base or mid-layer. Highly recommend its purchase for all the winter runs.
From: Phuc, Potomac, MD, USA 

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