Name: COSMIC ULT IV U-BK 3.5
Brand: Mavic
SKU: S00033170
Price: 4473 USD
Availability: InStock
Rating: 4 (1 reviews)

The Cosmic Ultimate IV shoes are designed for riders who want to feel every watt transfer through the drivetrain.
The Matryx® upper, made of Kevlar and polyamide fibers, features very low stretch to minimize power loss while remaining breathable.

The Matryx® jacquard pattern incorporates ventilation zones and reduces the use of adhesive.

The BOA® Fit System with Li2 dials allows for separate adjustment of tightening zones, with micro-adjustment in both directions.

Underfoot, the full-carbon sole features a new rigid design and incorporates openings to ventilate the forefoot.

Weighing 245g, the Cosmic Ultimate IV shoes are designed for racing, warm-weather runs, and long-distance efforts.

Main features

Matryx® Kevlar/Polyamide, full carbon sole, BOA® Li2: direct power transfer

Matryx® Kevlar and polyamide fibers offer the lowest elongation to transmit energy without loss.
The full-carbon sole features a rigid design.
BOA® Li2 dials provide precise tightening with micro-adjustment in both directions, useful when the intensity of the effort changes.

Ventilated Matryx® jacquard, reduced adhesive, underfoot openings: coolness in hot conditions

The Matryx® jacquard places ventilation openings on the upper, where heat accumulates.
Reduced adhesive minimizes air barriers. Underfoot, openings integrated into the carbon sole promote continuous airflow to the forefoot.

245 g, Matryx® upper, low-density carbon: reduced inertia

The Matryx® weave and low-density carbon sole aim for a lightweight design without sacrificing support. At 245 g, the Cosmic Ultimate IV remains responsive during accelerations and more comfortable on longer rides.

Specifications

Weight (8,5UK) per shoe : 245 g

Cyclists' opinions

Overall ratingAverage

4.0

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1 review

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KenAdvanced (+3 rides per week)

12345

6/28/26

“Just received them. Build quality looks great. Fit is spot on! The 44 2/3 fits my USA size 10.5 foot same as my 10.5 Nike or Hoka shoe. These replaced my old pair of Mavic Zxellium Pro shoes that I used for hot summer riding on the USA east coast (Ultimate 4 fit even better). The only thing I am concerned about is that though there are massive mesh openings in the carbon sole for air, the insole is thick and has no ventilation holes to carry the air through to the foot. Also the insole has no arch support, nor arch adjustments like my Shimano Phyre 903's do. Insoles are correctable, but a disappointment as this price level. I will update later after some rides.”

Answer from the team

“Hello Ken Thank you for your feedback and comments. We will pass your feedback on to our product manager and get back to you shortly. Enjoy your shoes. See you soon The Mavic Team”

Mavic Cosmic Ultimate IV Road Cycling Shoes