Understanding the anatomy of a running shoe is crucial for maximizing your performance and comfort at any stage of your running journey. Read on to discover the key components of a running shoe and how each feature contributes to your running performance. 

THE UPPER

The upper is part of the shoe that covers your foot, made from a variety of materials, including mesh, synthetic fabrics, and sometimes leather. The primary function of the upper is to provide support and breathability. 

  • MATERIAL: Most modern running shoes use lightweight, breathable mesh to keep your feet cool and dry.
  • FIT: The upper should fit snugly without causing any discomfort or pressure points. Look for seamless designs to minimize irritation.
  • PROTECTION: Some uppers include reinforced areas around the toes and sides to protect your feet from rocks and other debris.

OUR TOP BREATHABLE PICKS

HOKA CLIFTON 9

Built with an engineered knit upper for ultimate breathability, flexibility, and comfort.

BROOKS GHOST 16

Features a feel-good fit with an enhanced upper. Equipped with an engineered air mesh upper that blends stretch, structure, and breathability.

THE INSOLE

The insole, also known as the sockliner, is the removable layer inside the shoe that sits directly under your foot. It adds a layer of cushioning and can provide additional arch support.

  • CUSHIONING: Insoles often have foam or gel padding to enhance comfort.
  • SUPPORT: Many insoles are designed with specific arch types in mind (flat, neutral, or high arches).
  • CUSTOMIZABLE: You can replace the factory insole with custom orthotics if you have specific needs or preferences.

EXPLORE ORTHOTIC INSERTS

Orthotics, commonly referred to as insoles, can transform your run or walk. Add orthotics to your favorite footwear to correct pronation, improve your gait, and support your feet.

  • AETREX offers a variety of orthotic inserts that cover a range of common running discomfort in the feet including Plantar Fasciitis specific styles.
  • Insoles from CURREX are designed specifically to provide support, comfort, and to enhance performance for any walking or running need.

THE OUTSOLE

The outsole is the bottom part of the shoe that makes contact with the ground. It’s typically made from rubber or similar durable material and is designed to provide traction and protect the midsole from wear and tear. 

  • TRACTION: The pattern of the outsole’s tread is crucial for grip. Trail running shoes have more aggressive treads compared to road running shoes. 
  • DURABILITY: Outsoles are built to withstand the constant impact of running. High-wear areas may have extra reinforcement. 
  • FLEXIBILITY: Some outsoles are designed to be flexible, allowing for a more natural foot movement.

OUR TOP PICKS FOR DURABLE OUTSOLES

BROOKS GLYCERIN 21

Designed with a rubber outsole that’s abrasion resistant so as to not erode the shoe’s midsole. 

HOKA BONDI SR

Equipped with ultimate slip resistance for all-day comfort on the job. Designed with slip resistant rubber and tread outsole.

 

THE MIDSOLE

The midsole is the layer between the outsole and the insole. It’s typically made of foam and is responsible for most of the shoe’s cushioning and shock absorption. 

  • MATERIAL: Common materials include EVA (ethylene vinyl acetate) and TPU (thermoplastic polyurethane), each offering different levels of cushioning and durability.
  • CUSHIONING: The midsole absorbs the impact of each stride, reducing stress on your joints and muscles. 
  • STABILITY: Some midsoles have added features like medial posts or shanks to provide extra support and reduce overpronation.

HIGH-CUSHION MIDSOLE PICKS

HOKA BONDI 8

Experience ultra-cushioned mastery with Next-Gen Foam Technology for a softer, more resilient foam that promises longevity.

ASICS KAYANO 31

The Kayano 31’s midsole is built with FF BLAST™ PLUS ECO cushioning and PureGEL™ technology for a smooth ride. Equipped with a 4D GUIDANCE SYSTEM™ to help provide adaptive stability.

 

THE LACES

Laces might seem like a small detail, but they play a crucial role in ensuring your shoe fits properly. 

  • FIT: Properly laced shoes should hold your foot securely without causing discomfort.
  • MATERIALS: Laces can be made from various materials, including cotton, polyester, and elastic blends, each affecting how they feel and perform.
  • LOCKING SYSTEM: Some running shoes feature specialized lacing systems or locks to keep the laces in place and prevent them from coming undone mid-run. 

UPGRADE YOUR LACES

NATHAN REFLECTIVE RUN LACES

Switch out your old laces with these super-secure, grippy, no-tie elastic laces from Nathan. Designed with reflective properties to keep you safe on a night run. 

 

THE TONGUE

The tongue of the shoe sits under the laces and helps to cushion the top of your foot. It also plays a role in keeping the laces from directly contacting your skin. 

  • PADDING: A well-padded tongue enhances comfort and prevents lace pressure. 
  • ATTACHMENT: Some tongues are gusseted, meaning they’re partially attached to the upper to prevent slipping and keep debris out. 
  • BREATHABILITY: Like the upper, the tongue often includes breathable materials to help keep your foot cool. 

EXPLORE VARIOUS TONGUE STYLES TO ENHANCE RUNNING SHOE COMFORT

ON CLOUDRUNNER 2

Designed with a plush tongue for total comfort and easy step-in. Equipped with a tongue loop to keep laces in place.

GLYCERIN STEALTHFIT 21

Designed with an adaptable, sock-like fit fusing the upper and tongue. Promotes a streamlined, comfortable feel.

FIND YOUR IDEAL RUNNING SHOE FIT

Understanding the anatomy of a running shoe can help you make informed decisions when choosing your next pair. Each component plays a vital role in providing comfort, support, and performance. At Fit2Run, we’re committed to helping you find the perfect shoe for your needs. Whether you’re hitting the pavement or tackling rugged trails, knowing what goes into your running shoes will ensure you stay comfortable and injury-free. 

Visit your local Fit2Run for personalized advice from our Fit Experts or explore our wide selection of running shoes tailored to your needs by shopping online. Happy running!

Brooke Soracchi