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Assos earlyWinterInteractive Long Sleeve Base Layer

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Item # AAS0042

Don't worry though, we have a lot more Men's Long-Sleeve Base Layers in stock than that.

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Item # AAS0042


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.

Size chart


Men's Apparel
Leg & Knee Warmers 0 I II
Height 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 Warmers 0 I II
Chest 35.4in
46.5+ in
How to Measure:
For best results, take measurements over your underwear.
Measure around the widest part of your chest.

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Avg. ride time: 24h per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

Love this base layer

  • Familiarity: I've put it through the wringer

I have used this a lot and find it extremely useful for rides in the 40F's. I have the thicker Assos Winter base layer that I use for 20F's and 30F's. I have the white in XL. I am 6'1" and 200+ and find the fit is great. I highly recommend this.

Interesting difference between this and the Winter base layer: on this one the zipper is in the middle under your chin while for the Winter it is off to the side. The Winter is also about three times thicker so maybe this would have caused the zip to hit your neck. I've not had any issues with the zip on either.

Avg. ride time: 2h 35m per week
  • Average ride time is based on Strava activity over the last 3 months. Give your reviews credibility by connecting your account.

White/Black are different, runs small

  • Familiarity: I've used it once or twice and have initial impressions

My wife and I love our Assos jerseys and the discount price on these base layers was too good to pass up on so I bought three, one each of XS, S and M with the thought that I would wear the medium and she would either wear XS or S. Well I am 5'9" 150lbs and my wife is 5'5" and 115lbs. The M was too tight for me and while the S was about right for my wife it was white in color and the material was rougher than the black versions (XS and M were black). I thought it was really strange that the materials would be different for different colors of the same garment! The black was a silky lycra type material but the white had a rougher texture inside. Wierd, huh! The end result was that my wife is going to wear the medium - it is a tad loose in the arms for her but otherwise looks and feels right for her. Unfortunately I need to return the XS and the S.

Now I know that base layers are supposed to be tight fitting, but I just could not get comfortable in the M size, and my Assos jersey is M and fits loose! Too bad manufacturers can't keep better consistency in sizing. Aside from the sizing the garment is high quality and on the heavy side, I am sure it will keep my wife nice and warm on cooler days!