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Assos FI.13 S5 Bib Shorts


These FI.Mille S5 Long bib shorts are identical in every way to the standard FI.Mille S5 (non-Long) bibs, with two exceptions. The leg length is approximately 1 inch longer. The inseam on the FI.Mille S5 Long is 10", while the inseam on the standard FI.Mille is 9". The other difference are the color options. The standard FI.Mille is available in black only, while the FI.Mille S5 Long is available in colors as well as all black.

Assos makes several styles of shorts and bibs, but only the FI.Mille S5 Long carry the distinction of being called the long distance bibs. To understand why the tag of long distance has been bestowed upon them and what makes them different from the other bibs in the Assos range, you have to get a grasp on the design and technology used in the garment.

The body of the bibs are constructed from Assos's proprietary A430 sheer fabric. The A430 fabric for the Mille, is specially woven to offer more stretch and less muscle compression than other A430 garments. It is this added stretch and less tension on the body that make these bibs perfectly suited for longer rides or for larger riders that want a more forgiving pair of bibs that can stretch around a larger thigh or chest. In error, many riders think that the Mille are a bigger and more voluminous fit for larger riders, when in fact, they fit similar to other Assos bibs, but have the added elasticity to expand and fit larger riders. In summary, the FI.Mille Long bibs offer a body fabric that has more elasticity and less muscle compression which allows them to be more comfortable on longer journeys and/or fit larger riders.

Beyond elasticity and support, the A430 fabric used in the panels of the bibs wick moisture and help regulate your body temperature. It also offers plenty of support while managing to be low volume and light weight. At this level of bib shorts, we now see a curved and anatomical S5 chamois. The Mille's S5 Long chamois has the familiar klinik blue top sheet with dimples for air flow and heat management. The chamois in these bibs have multiple densities of material for comfort and is slightly thicker than the S5 chamois found in other Assos bibs and shorts.

Being an Assos bib, there is a strict adherence to anatomics and body fit. Each panel is pattern cut and anatomically correct, so when stitched together, the nexus of panels create Assos's Advanced Ergonomic Pattern Design (AEPD). The FI.Mille mimics the body while in the cycling position to create a second skin-like fit and feel. Simply put, these bibs are a product that are designed to fit while pedaling.

Included with the FI.Mille S5 bib shorts is a small tub of Assos chamois creme and a vented wash bag. These bibs are available in several colors and sizes.

See where this garment fits into the synergistic Assos Layering System


  • Highly elastic and wicking A430 fabric
  • S5 Mille dimpled chamois
  • Standard leg length
  • Vented rear mesh upper
  • Perforated front upper/suspenders
  • AEPD II anatomic fit
  • Silicone dot leg grippers
  • Includes wash bag and chamois creme
Reg Price $369.99
Item #: 841053


Average Rating:


 Anonymous : 

Absolutely the best shorts I have ever owned. 100 miles and absolutely no irritation or micro abrasions that one usually feels after showering when soap hits sensitive areas. These exude quality and are the epitome of the saying you get what you pay for. I usually use these for long club rides and I have never finished a century ride with any irritation or pain. Once you try Assos, it is hard to try anything else. I would have 6 pairs of these if I could afford it.

Pros: Quality, fit, lack of irritation, looks great

Cons: cost


 Anonymous : 

I'm a cheapskate and was skeptical....these bibs are worth the price....complete elimination of any irritation fits like glove!!!


 Anonymous : 

Hands down, best bib's I've ever owned


 William Kochi : 

This is one Assos bib shorts that can't be replaced by anything else, other than a newer upgraded one. One of the most comfortable bib shorts around. Its difficult to go back to my previous shorts from any manufacturer that i owned. I bought the T.607 for slightly colder temps, but the FI.13 are my favorites.

Pros: Fit, finish, materials feel great after any ride.

Cons: Cost, but quality makes up for it.


 Anonymous : 

I got these after years of trying so many brands and eventually found these and ended up buying 2 . They are all that you read about and more.You dont feel any material bunching up in the wrong areas and padding is excellent and you dont feel anything except the wind in your face and a smile on your face. i have washed mine over 100 times and ride alot and they still look brand new .


 Anonymous : 

The other comments, all true. You owe it to yourself to own one amazing pair of shorts.... And then see how often you wear the others after trying Assos once. You will be washing them constantly. Fortunately, Assos gear lasts and lasts.

3/19/2011 3:22:04 AM

 Anonymous : 

i have abut 30 assos items this is by far the best

8/2/2010 11:16:35 PM

 Anonymous : 

As the other reviewer said, these are nothing short of amazing. If it wasn’t for the 15% off I probably wouldn’t have bought them, but am glad I did. This is the third different Assos bibshorts I’ve owned. The FI.Unos were previously my fave (but apparently aren’t compatible with the Specialized Toupe seat, stitching comes undone), and the FI.Equipe being my least favorite (but still far better than any other manufacturer). The FI.13 S5 is heads and shoulders above anything else that I’ve worn, no comparison, and now they make my other Assos bibs feel slightly inferior. The only downside is now I have to go sell a kidney to replace my others. Oh, and if you’re a guy.....not sure how it works with the’ll be happy to know that these are extremely comfortable in the crotch area, as Assos somehow reduced the pressure in that area.

5/6/2010 4:37:23 PM

 Anonymous : 

There is no better cycling shorts maker than Assos. I still use Assos bibs I got in 1998, but these new ones are the ultimate. I absolutely love the fit and the compression they provide. I feel as if I am naked while wearing these shorts, securely naked that is. The only problem I have with these shorts is the price. Thankfully, after riding in them I can unequivocally say that they are more than worth the cost, if you are in the market for an unbelievably superior product.