My second favorite long sleeve top, the Columbia Women’s I2O Fusion Running Half Zip Long Sleeve Top is a bit thicker than the Mizuno Women’s Breath Thermo Running Half Zip, which is perfect for short easy runs, when I need warmer clothes because I’m not going to be running too hard.
The material is very light weight wise, but it’s thicker than others, therefore warmer, without it being too thick.
2 Cups 'N Run 