My supplier states that this zippered pullover is called the 1.5 because it’s light enough to wear as a tee but warm enough to be a light layer. As a 1/2 zip it should make life easier for those with longer hair. It’s 5.6 ounces and made from an 88/12 poly-spandex blend. It comes in 4 colors, mens and women’s cut and Sportek’s generous size range of XS-4XL. This material is VERY stretchable…almost felt like I was wrapped in a rubber band. A bit tight around my arms but that also makes it effective for layering. This will be a preference choice and warrants a sample test before purchase. Suggested retail is $30.58