The SPC.07 fabric Assos uses in their fall Interactive Long Sleeve Base Layer is the cool-weather version of the skinPull fabric they use for their interActive Spring and Summer base layers. The fundamental construction of SPC.07 is identical to skinPull: The yarn is made from 3 fibers -- 2 micro... read more

High-quality base layers are worth the expense. They keep you warmer and dryer, they don't get malodorous, and they last longer in better condition than the cheap stuff. It might hurt to shell out for an undergarment, but amortized over many years and combined with the greater comfort the premium... read more

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... read more

The winter Interactive Long Sleeve Base Layer is the warmest Assos long sleeve base layer. It accomplishes this by supplementing the SPC.07 fabric with the same warm, thick material proven to be so successful in Assos' previous generation frigid-weather base layer -- the Powerstatic Plus. The... read more

The defining characteristic of the Assos interActive Spring base layer is the interActive fabric itself. The yarn is made from 3 fibers -- 2 micro hydrophilic fibers are wound with a third real silver fiber. These fibers are different in shape and form, but they're woven in such a way to... read more

The Assos interActive Summer base layer is identical in every way to the Spring version with only one difference of note: Rather than being made from 190g interActive fabric, it's instead made from a 89g weight interActive to give it superior breathability for warmer temps. In addition,... read more

Wait! Don't cut the sleeves off your interActive Summer base layer when July rolls around! Assos makes a sleeveless version -- it's called the Hot Summer base layer and it features all the fabric and fit delights of the Summer version, but it comes sans sleeves. The soft piping on... read more

The key behind a top-notch base layer is to keep moisture off your body. While sweating is your body's cooling mechanism, if the sweat begins to saturate your clothing, the heaviness of the fabric stifles your skin and causes you to overheat more quickly. Base layers keep your skin dry, and that... read more

The proCOOL T with Mesh Base Layer is our best selling short sleeve, warm-weather-oriented base layer. It's ideally suited for temps ranging from 50-90 degrees, with its versatility rooted in the engineering of its fabric. proCOOL is a continuous hexachannel filament -- meaning that each fiber... read more

This version of the sleeveless proCOOL base layer is known as the Superlight Mesh, and it's what you want to choose on heinously hot days. Its full mesh construction has a honeycomb grid with substantially wider holes to it than plain proCOOL. This grid gives it full air permeability, and its... read more