Columbia Women's Midweight II L/S Top Shirt M PINK 100% Polyester Zoned thermal-reflective technology at front and back torso and breathable, sweat-wicking side inserts give you what you need, where you need it, while a versatile midweight fabric lets you wear this comfy long sleeve baselayer top in a wide variety of conditions and situations Ergonomically shaped flat-lock seams slide smoothly over your skin and underarm gussets deliver great fit and mobility Center back length: 25"