MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&
MTB - Apex Bib Liner Men&

Men's Apex Bib Liner

134 reviews
Regular price$84.00
Shipping calculated at checkout.

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OVERVIEW: Every inch of singletrack is meant to be enjoyed, and the Apex MTB Bib Liner ensures you'll have unencumbered, all-day comfort. Built from the foundation of our award-winning Ascent Vector Bibs, the Apex features the same endurance chamois we utilize from the Italian-manufacturer, Elastic Interface®. When temperatures rise, the mesh body fabric provides cooling breathability. A rear double pocket system not only includes an elastic retention strap for your pump, but on the body storage for a jacket or full-size water bottle so you can ditch the hydration pack during those 1-3 hour adventures.

FABRIC AND CONSTRUCTION: Breathable stretch mesh cover the majority of the body for extreme moisture transfer and body temperature regulation. Avertini lycra is used in the rise for increased durability and structure. The double pocket system built into the rear allows for on-the-bike access and storage that will not press against your spine while riding. The MARC 45mm legband incorporates a thin silicone strip to stay in place while pedaling. The multi-density Elastic Interface® Leige Carbonium chamois offers 4+ hours of comfort and includes carbon threaded, anti-microbial fabric.


  • Multi-density Elastic Interface® Leige Carbonium chamois
  • Breathable stretch mesh body fabric
  • Avertini Lyrca through the rise
  • MARC 45mm silicone legbands
  • Two rear storage pockets
  • Elastic pump retention strap
  • 9in/23cm inseam (size medium)

The following OFF BODY inseam lengths were measured on a garment at rest. They may not exactly reflect the ACTIVE inseam length when the garment is being worn due to the combined effects of the 1) the riders's torso and femur length, 2) stretchiness of the material, and 3) the rider's leg musculature.

S = 22.5 cm
M = 23 cm
L = 23.5 cm
XL = 24 cm
2XL = 24.5 cm


Pair with our Apex MTB Short, offering the same performance-minded minimalism. Also, pick up the lightweight, breathable, contoured Apex MTB jersey.

Have questions about sizing, fit or garment usage?

Don't hesitate to contact us.

Yosh  Melissa  Ryan

We are here to help and answer all your questions!


Or, send us an email and we will get back to you as soon as possible.

Fit Guide


Items designed to provide a traditional performance fit.


Items in this category have been designed to provide an aerodynamic form fit.

Second Skin Fit


Items in this category have been designed to provide an ultra form fit.

Fit Videos


Size Charts

Custom cycling clothing size chart example - man
Pactimo Cycling Clothing Size Chart
Custom cycling clothing size chart example - woman

Kid's Cycling Clothing Size Chart

PLEASE NOTE: Not all garments are available in every size listed on size charts.

Arm, Knee and Leg Warmer Sizes

Shoe Cover Size Chart

Custom cycling sock size chart

Cycling Glove Size Chart

Measuring Tips 


Using a soft measuring tape, bring the tape across your back under each arm, around the front. For women, measure the widest point of the bust. For men, measure around the largest part of your chest.


Bend to one side to find natural indentation in torso. This is your natural waist. Run tape around waistline, keeping tape parallel with floor. 


Stand on a level surface with feet together. Measure around fullest part of hips and bottom (approximately 7" - 9" below waistline), keeping tape parallel with floor.



Typically delivers in 3-5 business days
(Standard Shipping Option)


USPS Priority

1-3 business days.

USPS Priority Service Map

USPS Shipping Map

USPS Priority Express

1-2 business days.

* Please note: All orders placed after 8 am will be fulfilled the following business day.

FedEx 2-Day Shipping

Arrival in 2 business days.

* Please note: Orders placed after 11 am will be fulfilled the following business day.


Additional Information for USA Orders

All orders must be shipped within the USA, Puerto Rico or an APO.
At this time we do not offer shipping to Canada.

All Made-to-Order (MTO) and Jersey for a Cause items are delivered 14-16 days from the date of purchase via FedEx Express. Please note that FedEx cannot deliver to PO Boxes. If you order an MTO item and use a PO Box, your order will be shipped to our Denver office and forwarded to the PO Box via USPS. 

PLEASE NOTE: Information on this page does not apply to custom clothing orders.
For information about Pactimo Custom, please visit


Customer Reviews
4.8 Based on 134 Reviews
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Shawn L.
United States United States
Apex Bib Liner

Great liner. I’m 5’11 & 170lbs and size M is snug but comfortable after a few wears. The rear pocket is nice.

Steve M.
United States United States

I bought my original pair over a year ago and love them. I tried a few others that I found in bike shops on sale and haven’t liked anything nearly this much. I love the pockets in the back. I put two water bottles in the back rather than carry a backpack. I love them so much I bought two more sets. They’re the only ones I wear anymore. Very comfortable, keep everything where it should be, and allow me to focus on enjoying the ride rather than whether I’m comfortable or not. Super pleased! I am 6’3”, 190lbs, 34 waist, and the large size fits perfectly.

Kent H.
United States United States

6’ 3” 200. Ordered XL. Great fit and feel, perfect for the 2 hour rides I like to ride.

Craig D.
United States United States
Like a glove.

Experience has been amazing. Fit in the quads is on point, the pockets in the back make for easy access, and the lightweight material has kept me cool. Fit like a glove and perform beyond expectations!

Rene D.
United States United States
Apex Bib Liner

This Bib was exactly what I expected to be. it is very comfortable using t underneath your short specially for those days that allow you to do it now... it feels breathable and it works well. Also those rear pockets are awesome specially when use my 3/4 since those jerseys do. It have any back pockets.... so conclusion.... well done Pactimo keep up the good job

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