Shoe Science says about Kayano 31

We use the shoes in motion, hence performance in motion.

• Road - everyday trainer/ cruiser
• Rotation - Kayano (Trainer), Trabuco Max (Trail), Superblast (Race)
• Forward transition - 6/10
• Dynamic stability - 7/10
• Dynamic cushioning - 7/10
  

Many shoes will have a very similar profile yet perform differently for different people. We recommend an in-store fitting for a new style and online for the 'tried and true'.
 
Key Stats

• Width - D is wider than standard
• Weight - 265 gms
• Rear stack - 28
• Forefoot stack - 18
• Offset - 10mm
• Carbon plate - No

ASICS says

The GEL-KAYANO focuses on delivering holistic, adaptive stability with premium comfort underfoot. It is ideal for runners looking for a combination of moderate support and high-cushioning during their run.

4D GUIDANCE SYSTEM™ is found in the midsole. This new technology helps to steady your stride.

PureGEL™ technology improves softness and shock absorption to reduce the impact on your joints and keep you running comfortably.

FF BLAST™ PLUS ECO foam delivers softer landing and energised cushioning to keep you feeling comfortable on harder surfaces.

The new technical engineered upper material provides comfort and a stable fit.