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Gore Bike Wear Base Layer Long-Sleeve Shirt - Men's

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Item # GBW0377

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Item # GBW0377


Dial in your cool weather kit.

One reason that it’s more difficult to get out and ride during the winter months is that it’s more difficult for your body to maintain an ideal temperature. This increases fatigue and makes riding more strenuous. The Gore bike Wear Functional thermo Base Layer helps your body maintain that temperature more efficiently to make the miles slide by more easily.

The key performance function of the Thermo Base Layer is moisture management. Your body has a much more difficult time regulating its temperature when your skin is wet. The Thermo Base Layer fits like a second skin to increase moisture-management efficiency. The combination of an internal hydrophobic fabric (100% polyester)with an external hydrophilic fabric (100% polyester) pulls moisture away from your body to keep your skin dry and aid in temperature regulation.

Gore designed the Thermo Base Layer with as few seams as possible, since they cause irritation. Where seams were necessary it used flatlock seams, which cause less chafing than the traditional variety. Finally, Gore designed the WS Thermo with an extra long back to give you full coverage in the seated position.

The Gore Bike Wear Functional Thermo Base Layer comes in White or Black. It’s available in sizes Small to XX-Large.

  • Extra-long back won't expose your backside when you're hunched deep in the drops

Tech Specs

88% polypropylene, 8% elastane, 4% nylon
Recommended Use:
cycling, mountain biking, chilly weather
Manufacturer Warranty:
1 year

Size Chart

GORE Bike Wear & Running Wear

Men's Apparel

32.75 - 34.75in

(83 - 88cm)

35 - 37in

(89 - 94cm)

37.5 - 39.5in

(95 - 100cm)

39.75 - 41.75in

(101 - 106cm)

42 - 44in

(107 - 112cm)

Arm Length

29.75 - 30.75in

(76.5 - 78cm)

31 - 31.75in

(79 - 80.5cm)

32 - 32.75in

(81.5 - 83cm)

33 - 33.75in

(84 - 85.5cm)

34 - 34.75in

(86.5 - 88cm)


28.75 - 30.75in

(73 - 78cm)

31 - 33in

(79 - 84cm)

33.5 - 35.5in

(85 - 90cm)

35.75 - 37.75in

(91 - 96cm)

38 - 40in

(97 - 102cm)


33.5 - 35.5in

(85 - 90cm)

35.75 - 37.75in

(91 - 96cm)

38 - 40in

(97 - 102cm)

40.5 - 42.5in

(103 - 108cm)

43 - 45in

(109 - 114cm)


30.75 - 31.25in

(78 - 79cm)

31.5 - 32in

(80 - 81cm)

32.5 - 32.75in

(82 - 83cm)

33 - 33.5in

(84 - 85cm)

34 - 34.25in

(86 - 87cm)

How to Measure:
For best results, take measurements over your underwear.
Measure under your arms, around the fullest part of your chest.
Arm Length:
Measure from the center of your back to your wrist with arms held out.
Measure around your natural waistline, keeping the tape a bit loose.
Measure around the fullest part of your body at the top of your legs.
Using pants that fit well, measure the crotch seam to the bottom of the leg.

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Gore base layer

  • Fit: True to size
  • Size Bought: XL

Fits well to size. Delivers what I expected.

Essential gear

  • Familiarity: I've put it through the wringer
  • Fit: True to size

This is one of the best pieces of cycling clothing I own. Wearing this alone under a wind-stopper mid-weight jacket keeps me warm with temps in the low 40s. I'll sweat in it...but never feel clammy or uncomfortable. It's a tight fit, but not constricting. (In other words, it fits like it's supposed to...but I sized up to large. It may run a bit small.) It washes well (hang to dry) and feels new every time I put it on. I've been very happy with Gore Bike Wear.

Warm enough for comfort

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: Small

Bought this for my winter cycling, and now I can't get enough of it! I've worn in on campus and back country snowshoeing and it's never let me down yet. I've used it in temps ranging from -15 to 40, and it's never been too much or too little.
Length is generous in the arms and torso, but I never worry about it riding up on my back while I'm hunched down in the drops or out on the trail. I have a small-to-medium athletic body type, with a longer than average reach, too.
Another aspect I'm satisfied with is that I never have to worry about getting soaked with my sweat, it does a first rate job dealing with body moisture.

That's exactly my experience as well. Great product.

Warm Base Layer

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

Regarding size, I have a 41" chest, weigh 165 lbs., and am 6'0 tall. The XL is just right, very snug, without being tight. The length is generous, and the arms are generous, probably at least an inch and a half extra in the wrist.

Functionally, I only wore it once, on the lakefront in Chicago, as a base layer, temps around 38 and pretty chilly winds, under several other layers. Seemed to do the job. I had a Smartwool Micro Fleece over it, and the both of them seemed to be damper than I would have expected after riding. I think the Gore would perform better with another synthetic over it, then a Merino Wool over them both. After one ride, not able to really comment on its moisture-wicking properties. Very comfortable against the skin.

Fit is excellent, quality is excellent, typical to Gore products.