The Saucony Fastwitch 6 is a racing flat designed for a mild overpronated foot motion, ideal for speedwork and long distance races.


The Saucony Fastwitch 6 gives you the performance of a racing shoe, while retaining a bit of support for the overpronators among us. A lightweight design means that there is little holding you back from your next PR, while a traditional medial post provides mild stability. A carbon rubber outsole offers durability and unrelenting grip on the road, and a breathable mesh upper keeps your feet cool. Lace up the Fastwitch 6 for speedwork or race day.

Model Number:

Weight: 7.5 oz/212.6 g (size 9)

Stack Height: Heel (18mm), Forefoot (14mm)

How It Fits (based on width D) 

  • Sizing: Standard running shoe length
  • Heel:  Narrow to medium
  • Mid-foot: Medium volume
  • Forefoot: Medium
  • Toe-Box Height: Low
  • Arch Structure: Medium
  • Shoe Shape: Semi-Curved


  • Dual Density SSL EVA uses high density EVA in the midfoot to control overpronation, and a SSL (Saucony Super Lite) midsole material throughout the remainder of the shoe for lightweight comfort, rebound and durability.
  • Midfoot Support Bridge is a thermoplastic unit that extends from the heel through the midfoot for increased torsional rigidity.


  • XT-900 is a carbon rubber material that offers durable traction.


  • Ultralite Mesh covers the entire upper and is a breathable ultra lightweight fabric.
  • Flex Film Overlays are made of a thin film that is welded to the upper for a snug, secure fit.
  • Premium Sockliner is a breathable, moisture wicking, anti-odor and anti-microbial Ortholite insole that provides improved step-in comfort with rebound properties.
  • Strobel Last with the upper stitched to full length HRC Strobel Board, for responsive, enhanced cushioning and a soft underfoot feel.

Footwear Performance Characteristics

Pronation Grade:

  • Neutral
  • Minimum
  • Moderate
  • Maximum

Heel-To-Toe Drop (mm):

  • 0
  • 1-2
  • 3-4
  • 5-6
  • 7-8
  • 9-10
  • 11+

Stack Height:

  • Barefoot
  • Minimal
  • Low
  • Medium
  • High
  • Maximal


  • Road
  • Road/Trail
  • Hard Trail
  • Varied Trail
  • Soft Trail

Shoe Help Video (English Only)