The earlyWinter Interactive Long Sleeve Base Layer is identical in every way to the Assos Fall base layer, with one central difference: It has a zippered, high-neck construction, in contrast to the Fall's collarless design. The zippered neck allows for temperature regulation -- especially nice when you're climbing. And its high-neck cut wards off the chilly wind a bit better.

Assos suggests that you use the earlyWinter Interactive Long Sleeve Base Layer along with their elementOne or airJack jackets, depending on the temperature. Assos recommends the earlyWinter for temperatures ranging from 43-54 degrees. Available in sizes Small-TIR, in two colors -- Black and White.

One final note: Assos base layers are not specific to men or women. They are designed to be unisex.