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  • Giro Base Liner Short - Men's
  • Giro Base Liner Short - Men's Back
  • Giro Base Liner Short - Men's Back
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GiroBase Liner Short - Men's

Item # GIR00HH

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Item # GIR00HH

Start at first base.

Rallying the trail all day doesn't have to come at the cost of rallied sit bones — that's what Giro crafts the Base Liner Shorts for. These lightweight and breathable liner shorts fit snug, like your favorite boxer briefs, but unlike your favorite boxer briefs these shorts are loaded with a multi-density pad that takes the sting out of rough and rowdy trails. Breathability is a top priority on the Base Liner Shorts, with a combination of panels of polyester and spandex that actively pull away moisture, and mesh panels that let cool air in to keep you comfortable. To make things a little bit easier on you when nature calls, Giro equips these shorts with a fly opening.

  • Your first step to a comfortable day on the bike
  • Padded shorts take the sting away from trail chatter
  • Multi-density foam absorbs vibrations
  • Let your legs breathe with mesh panels
  • Fly opening offers an easy solution to nature calls
  • Wicking materials pull away sweat to keep you dry
  • Soft, brushed waistband locks in place comfortably
  • Keep hems secure with silicone grippers
Tech SpecsSize
Tech Specs
[main body] 79% polyester, 21% spandex, [mesh] 92% polyester, 8% elastane
Base liner chamois
soft-brushed elastic
Recommended Use
mountain biking
Manufacturer Warranty
1 year


Men's Cycling Apparel
 Small MediumLargeX-Large  XX-Large

35 - 36in
(88.9 - 91.4cm)

37 - 38in
(94.0 - 96.5cm)
39 - 40in
(99.1 - 101.6cm)
41 - 42in
(104.1 - 106.7cm)
43 - 44in
(109.2 - 111.8cm)
 Sleeve 34in
  30323436 38
Natural Waist 29 - 30in
(73.7 - 76.2cm)
 31 - 32in
(78.7 - 81.3cm)
 33 - 34in
(83.8 - 86.4cm)
 35 - 36in
(88.9 - 91.4cm)
37 - 38in
(94.0 - 96.5cm) 
 Hip  36 - 37in
(91.4 - 94.0cm)
 38 - 39in
(96.5 - 99.1cm)
 40 - 41in
(101.6 - 104.1cm)
42 - 43in
(106.7 - 109.2cm) 
44 - 45in
(111.8 - 114.3cm) 
 Inseam  31.5 - 32in
(80.0 - 81.3cm)
32.5 - 33in
(82.5 - 83.8cm) 
33.5 - 34in
(85.1 - 86.4cm) 
34.5 - 35in
(87.6 - 88.9cm) 
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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Good as it gets

  • Familiarity: I've put it through the wringer

Padded bike shorts aren't generally known for comfort. The Giro Base Liner pushes that but giving you a liner that is light weight, breathable and super comfortable. Slide these under your favorite bike shorts for a bit more cushion for the pedal up.

Great padding

    I wear it underneath my POC MTB shorts. The shorts are very breathable and provide solid padding. Very happy with them.