REI offers the Helly Hansen Women's Active Flow Half-Zip Long Underwear Top in Frozen Blue or Magenta for $34.73. In cart, it drops to $26.04. Opt for in-store pickup to dodge to the $5.99 shipping charge. That's $44 off list and the lowest price we could find. It's available in sizes XS to XL, although not in all size/color combinations.