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  • Giro Chrono Sleeveless Base Layer - Women's
  • Giro Chrono Sleeveless Base Layer - Women's Back
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GiroChrono Sleeveless Base Layer - Women's

Item # GIR00BL

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  • Griffin,XXS/XS ($59.95)
  • Griffin,S/M ($59.95)
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Item # GIR00BL

Smart layers.

The Giro women's Sleeveless Chrono Base Layer combines high-tech fabrics with streamlined styling to provide a cool, comfortable ride. Made from a soft and stretchy synthetic blend, this base layer whisks moisture away and moves with you as you change positions on the bike to eliminate uncomfortable bunching or chafing. Lightweight construction makes this a versatile piece of cycling kit, easily layered under a summer jersey to improve moisture management or under a fleecy jacket to add just a hint of extra layering for chillier days.

Tech SpecsSize
Tech Specs
Trusaro (60% nylon, 30% polyester, 10% elastane)
form fit
Recommended Use
Manufacturer Warranty
1 year


Women's Cycling Apparel

32 - 33in

(81.3 - 83.8cm)

34 - 35in

(86.4 - 88.9cm)

36 - 37in

(91.4 - 94cm)

38 - 39in

(96.5 - 99.1cm)

39 - 41in

(99.1 - 104.1cm)


24 - 26in

(61 - 66cm)

26 - 28in

(66 - 71.1cm)

28 - 30in

(71.1 - 76.2cm)

30 - 32in

(76.2 - 81.3cm)

32 - 34in

(81.3 - 86.4cm)

 2 (XXS)4 (XS)6 (S)8 (M)10 (L)12 (XL)

23 - 24in

(55.9 - 61cm)

24 - 26in

(61 - 66cm)

26 - 28in

(66 - 71.1cm)

28 - 30in

(71.1 - 76.2cm)

30 - 32in

(76.2 - 81.3cm)

32 - 34in

(81.3 - 86.4cm)


32 - 34in

(81.3 - 86.4cm)

34 - 36in

(86.4 - 91.4cm)

36 - 38in

(91.4 - 96.5cm)

38 - 40in

(96.5 - 101.6cm)

40 - 42in

(101.6 - 106.7cm)

42 - 44in

(106.7 - 111.8cm)

How to Measure:
For best results, take measurements over your underwear.
Measure under your arms, around the fullest part of your chest.
Natural Waist:
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.
Measure from the center of your back to your wrist with arms held out.

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  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: S/M

I was looking for something soft and next to skin feeling and I have found it! It isn’t bulky and is comfortably snug (read not constricting) in all the right places for free movement. I’m weary this mostly in the fall for a little extra insulation so I don’t know how it will feel in the summer...but it is light enough weight that I suppose it would do nicely. One more thing, it comes up high in the front so if ya unzip your jersey it still covers your girls well.

Smooth and Simple

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

In my opinion, a good (great) baselayer shouldn't be noticed. It should do its job--insulate, wick sweat, without a lot of pomp and circumstance.

The Giro Chrono does this exceptionally well. It lays flat and stretches well, keeping a smooth silhouette beneath jersey and bibs. It insulates well, surprisingly so over this weekend's 60* rides. I've been really impressed with it so far!

Sizing wise: I took a small/medium and it fits well. I'm 5'6", 145#, 32D.