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  • Assos Skinfoil Winter Long-Sleeve Base Layer - Men's
  • Assos Skinfoil Winter Long-Sleeve Base Layer - Men's 3/4 Front
  • Assos Skinfoil Winter Long-Sleeve Base Layer - Men's Back
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AssosSkinfoil Winter Long-Sleeve Base Layer - Men's

Item # AAS00CF

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  • Blackseries, I-S/M ($109.00)
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Item # AAS00CF

Skinfoil Winter Long-Sleeve Base Layer

  • Assos' warmest base layer for cycling in the depths of winter
  • Seamless construction is soft and comfortable against the skin
  • Fabric is warm yet remains breathable for high-intensity riding
  • Moisture-wicking yarn prevents you from getting cold and clammy
  • Strategic compression supports key muscle groups while riding
  • Non-restrictive fit sits nicely under your favorite jersey or jacket
Tech SpecsSize
Tech Specs
97% polypropylene, 3% elastane
Insulation Weight
Recommended Use
road cycling
Manufacturer Warranty


Men's Apparel
Leg & Knee Warmers 0 I II  

4ft 11in - 5ft 2in

(150 - 159cm)

5ft 3in - 5ft 6in

(160 - 169cm)

5ft 7in - 5ft 10in

(170 - 179cm)

5ft 11in - 6ft 1in

(180 - 185cm)

6ft 1in - 6ft 3in

(186 - 190cm)

6ft 3in - 6ft 5in+

(191 - 195cm+)

XLG but wider
Arm Warmers0III 















How to Measure:
For best results, take measurements over your underwear.
Measure around the widest part of your chest.

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  • Familiarity: I've used it several times
  • Fit: True to size

Very warm base layer! Really like the neck coverage. Have been going out with just this layer and a short sleeve jersey over it the past few weeks in 45F - 50F temps.

Excellent Baselayer

  • Familiarity: I've used it several times
  • Fit: True to size

The Assos Skinfoil is an unusual baselayer design. It is made of 95% polypropylene and 5% elastane (Spandex). The Skinfoil is designed to wrap your body like a skin suit. When I first removed the size 0 Skinfoil out of its packaging, it looked like an outfit for a 10 year old. The garment is very elastic, it compresses the body, but I don't feel suffocating, and it does not restrict any movement. When I wear the Skinfoil underneath a fitting jersey or jacket, there is no extra fabric bulge and folds to deal with. This is very different from wearing a fleece baselayer; fleece is bulkier, heavier and more restrictive. Polypropylene fabric is one of the lightest synthetic fibers in existence, the thermal conductivity of this substance is lower than that of most synthetic fibers, which means that it is ideally suited for cold weather wear. The fabric does not absorb water, so all your sweat is wick towards the outer garments. While this fabric's moisture-transferring properties are highly desirable for sportswear, the inability to wash this fabric with hot water makes it hard to remove odors from polypropylene sportswear. The new Skinfoil has a fragrance to it, it's probably the anti-odor treatment I'm smelling. Given the fabric's limitation, I make a habit of washing the garment immediately after each use and use cold water only. By the way, polypropylene fabric in general is susceptible to UV damage, so don't use it as an outer layer, or wear a long sleeve Skinfoil under a short sleeve jersey all the time.

I was riding outside this morning in 40 degrees cloudy weather. I paired the Skinfoil with an Assos Mille jacket. At the beginning of the ride, I was warm, but not toasty warm, and I could feel the chill in the air. But it was not frigid and the body did not tighten up. After a few minutes when the body got warmed up, it felt very good. The chilly wind was in my face, but the body stayed loose and comfortable. Towards the end of the 90 minute ride, my body was warm, but I did not feel drenching in sweat or overheated. The Skinfoil was slightly moist from the sweat and it formed a layer of cooling fabric. I did not feel wet at all, just a cool fabric against my warm body. It felt pretty good, comfortable, no overheated or frigid body. Once I went indoor, the Skinfoil dried up in just a few minutes, I didn't feel the need to take it off right away.

As for the sizing, I'm 5'7", 135 lb., and my chest size is 38". The Assos web site as well as their Switzerland support folks recommended a size 0. All my Assos jerseys and jackets are in SMALL. The Skinfoil in Size 0 fits me like a glove. I don't know why the Competitive Cyclist site shows a size 0 for XXS/XS and a size I for S/M, that is different from the ASSOS recommendation.

Excellent Baselayer

perfect fit and feel

  • Familiarity: I've used it once or twice and have initial impressions
  • Fit: True to size
  • Size Bought: Large

I wore this base layer on a morning ride (32 degrees) with a Castelli Perfetto jacket. Both were more than enough. The Assos was night and day vs. a ouple of other base layers I tried. It immediately disappeared, was warm and kept the warmth while allowing for great ventilation. Super comfortable and you can tell the quality as soon as you take it out f the bag - highly, highly recommended!!!