Altra 3-Sum Women's Shoes Aqua
MSRP: $130.00
Price: $89.88
Altra 3-Sum Women's Shoes Aqua
Industry Video
Rollover product image for a larger view.

Run natural off the bike with the Altra 3-Sum. Designed to meet the needs of the competitive triathlete, this racing shoe features a zero drop platform to encourage an efficient stride, while retaining the underfoot protection you need to tackle longer distances. A seamless upper is tailor-made for sockless wear, and a quicklace system allows you to fly through T2. An anatomical fit allows for toe splay without sacrificing security.

Model Number: A2224-1

Weight: 6.7 oz (size 8)

Stack Height: Heel (13mm), Forefoot (13mm)

Available Widths: B=Medium

How It Fits (based on width B)

  • Sizing: Standard running shoe length
  • Heel: Medium to wide
  • Midfoot: Medium volume
  • Forefoot: Medium to wide
  • Toe-Box Height: Medium
  • Arch Structure: Medium
  • Shoe Shape: Semi-Straight


The 3-Sum is a minimum featured, minimum neutral shoe intended for training and racing.


  • A-Bound is a recycled, environmentally friendly midsole compound for resilient underfoot protection.


  • EVA midsole foam for durable cushioning.
  • Natural Ride System (NRS) design includes a more natural, foot-shaped last, zero millimeter heel to toe drop, and metatarsal-specific shapes in the outsole to assist in proper foot mechanics and allow for more natural foot movement.
  • Natural Foot Design follows the natural shape of the foot for ultimate comfort.


  • Quick Dry Air Mesh wicks water away from your foot while remaining light and breathable.
  • Support Insoles are 5mm-thick removable insoles designed for runners needing more traditional support and a molded arch.
  • Seamless Upper reduces irritation and provides next-to-foot comfort.
  • Pull Tabs allows for quick entry with a single-handed pull.
  • Asymmetrical Lacing Design follows the shape of the foot for improved fit and feel.
  • Strobel Last with the upper stitched to full length fabric for a comfortable underfoot feel.


  • SpeedPod Outsole follows the natural construction of the human foot for maximum flexibility and a responsive ride.
  • Blown Rubber offers lightweight traction, flexibility, and a responsive ride.
  • Drainage Holes in the heel and forefoot allow excess water to exit the shoe.

Shoefitr shows you how a shoe will fit.

Shoefitr collects the internal measurements of shoes using 3D scanners.
We compare measurements of your current shoe to the one you want to buy...
...and recommend the best-fitting size.
show technology
Altra 3-Sum Women's Shoes Aqua $89.88
Free Shipping - Free Returns