• Terrain


    Shoes best for road, track and light gravel. See the best road shoes.


    Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

    Good to know

    As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

  • Arch support

    Neutral / cushion / high arch

    Shoes for runners who do not need any additional arch support (Around 50% of runners). Best for people with normal, high or medium high arches. See the best neutral shoes.

    Stability / overpronation / normal arch

    Shoes for runners who need mild to moderate arch support (Around 45% of runners). Best for runners with a low arch. See the best stability shoes.

    Motion control / severe overpronation / flat feet

    Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

    Good to know

    - Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
    - More about arch support in this video.
    - Find your arch type by following steps from this video.

  • Use

    Daily running

    Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.


    Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

    Good to know

    If you want just one pair of shoes, buy a shoe for daily running.

  • Price
  • Weight
    Men: 10.3oz
    Women: 8.8oz
  • Heel to toe drop
    Men: 8mm
    Women: 8mm

    The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

    There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.

  • Heel height
    Men: 18mm
    Women: 17mm
  • Forefoot height
    Men: 10mm
    Women: 9mm
  • Width
    Men: Normal
    Women: Normal
  • Release date
Show more facts


Expert Reviews

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  • First look / Unboxing | Asics

  • First look / Unboxing | Shop Zappos

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  • The Asics HyperGel SAI is a running shoe that’s designed for the neutral pronator. The façade focuses on a street-ready construction to accommodate casual use. An open mesh exterior covered by another layer of textile offers a snug and secure wrap. An asymmetrical lacing system encourages an anatomically tuned fit.
  • Underfoot cushioning is given by the HyperGEL™ system, which is comprised of full-length eTPU and GEL® beads. Shock absorption and gait smoothening are the functions of this technology. A rubber outsole offers protection against wear-and-tear.

The Asics product page for the HyperGel SAI states that it is recommended for runners to go up half-a-size to achieve a pleasant in-shoe experience. When it comes to width, the available options are D – Medium for men and B – Medium for women.

A rubber outsole is tasked with protecting the rest of the platform from the abrasive nature of the roads. The grippy nature of the compound also brings traction, a trait that is important for all running shoes.

The forefoot area has a tread pattern and mild flex grooves that heighten traction and foot flexibility. The toe-off phase of the gait cycle stands to benefit from such a feature.

The midsole unit is comprised of the HyperGEL™ cushioning system. This compound houses full-length eTPU and GEL® beads. Both of these elements contribute to an energized and comfortable performance. The proprietary GEL® pieces are responsible for attenuating impact during the landing phase. In a similar fashion, the Adidas Ultra Boost utilizes its unique midsole material to deliver shock absorption and energy return.

The external portion of the Asics HyperGel SAI’s upper unit is made up of an open mesh that’s reinforced by extra layers of textile. These parts of the façade are meant to hold the foot securely and prevent it from wobbling.

The MONO-SOCK® Fit System involves a smooth, one-piece interior sleeve. A traditional tongue unit is removed from the overall design; a slip-on construction is put in use, instead.

The heel portion has a reflective patch to make the runner visible when adventuring at night. The left shoe’s patch has the Kanji symbol for ‘mind’ while the right has the equivalent of ‘body.’ This visual flair highlights the essence of the Asics brand: A sound mind in a sound body.