Good to know

  • This running shoe, the Asics Gel Cumulus 21 Winterized, is strategically designed for paved surfaces. It features the FlyteFoam cushioning that offers a more comfortable ride. 
  • The midsole area utilizes the FlyteFoam Propel foam. It is a combination of high energy return and lightweight construction that offers a bouncier ride and unrivaled toe-off phase. As a result, better performance is experienced by the user. 
  • Integrated into the shoe is a sturdy and resistant material called AHAR+. This component of the shoe provides additional durability to the platform. 
  • Along with the AHAR+ are the molded snow rubber outsole and heel plug. The primary purpose of this is to provide extra grip and durability.

The jacquard mesh of the Asics Gel Cumulus 21 Winterized is sure to adapt to the natural curvature of the foot. This breathable material is meant to deliver a more comfortable and secure wrap during the running activity.

The AHAR+ outsole is integrated into the Asics Gel Cumulus 21 Winterized. AHAR is the acronym for Asics High Abrasion Rubber. This material is strategically placed in critical areas to provide exceptional durability.

Used in this road running shoe is the guidance line midsole technology. This feature is described as vertical flex grooves that aim to enhance gait efficiency. When compared to Asics Gel Cumulus 21, it utilizes the same outsole material as well.

Used in crafting the shoe is the Trail Specific Outsole. This is made up of reversed lugs that are essential in providing downhill and uphill traction on a wide variety of paved surfaces.

Described as Asics' lightest midsole formulation, the FlyteFoam Lyte is used in making the running shoe. It is composed of nanofibers that offer a continuous cushioning. 

The FlyteFoam Propel technology is integrated into the Asics Gel Cumulus 21 Winterized. This component of the shoe utilizes the elastomer compound that offers a bouncier ride.

To attenuate shock during the toe-off and impact phase, the Rearfoot and Forefoot Gel technology is featured in the shoe. This cushioning system is focused on allowing foot movements as it transitions through the gait cycle. 

Utilized in the Gel Cumulus 21 Winterized is the Impact Guidance System (IGS). The IGS is meant to improve the natural gait of the foot. It is a design philosophy that enhances the heel-to-toe transition during the running session.

The shoe features an ethylene-vinyl acetate (EVA) sock liner. This component of the footwear aims to deliver additional cushioning.

Great ventilation is encouraged by the jacquard mesh upper. This material is significant in keeping the foot cool and dry. As a result, a healthier foot environment is promoted.

Featured in the Asics Gel Cumulus 21 Winterized is the reflective details. This is added on the outside part of the shoe to improve visibility, especially in low light areas.

Added to the shoe is the warm collar lining. The primary goal of this is to increase warmth at the collar of the shoe.

The SpEVAFoam 45 Lasting is employed in the shoe. It is described as a 45-degree full length lasting material that offers a more comfortable and softer in-shoe feel. 


How Asics Gel Cumulus 21 Winterized ranks compared to all other shoes
Bottom 46% road running shoes
All road running shoes
Top 43% Asics running shoes
All Asics running shoes
Bottom 47% neutral running shoes
All neutral running shoes


The current trend of Asics Gel Cumulus 21 Winterized.
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Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.