Asics Gel-Kayano 31 Running Shoes

Description

Upper: High-containment stretch-knit upper backed by a rigid external heel counter to keep the calcaneus bone steady and aligned over the footbed.
Midsole Cushioning: Thick stack of FlyteFoam BLAST+™ ECO foam paired with PureGEL™ technology engineered to dissipate vertical impact forces before they reach ankles, knees, and hips.
Cushioning & Stability Technologies: 4D GUIDANCE SYSTEM™ features an adaptive arch island that gently bounces back under weight, supporting natural arch posture without harsh medial posts.
Outsole: Broad, full-contact HYBRID ASICSGRIP™ footprint mapped to eliminate localized pressure spikes under the heel and forefoot metatarsals.

Key Features & Benefits

Joint & Arch Protection: Adaptive support island reduces pronation velocity, easing strain along the plantar fascia and medial knee joint.
Grounded Heel Alignment: Molded rearfoot counter holds the heel firmly in place to prevent inward foot rotation.
High-Impact Shock Mitigation: Hidden PureGEL™ unit buffers heavy heel strikes to protect joint cartilage.
Removable Footbed: Factory OrthoLite™ X-55 sockliner removes easily to fit custom medical orthotics or arch support insoles.

Sizing & Fit Advice

Fits True to Size (TTS). The removable sockliner easily accommodates custom orthotics; choose Wide (2E) if using thick medical custom inserts.

How to Find Your Size (Step-by-Step Guide)

1. Setup: Place a plain sheet of paper on a hard floor, flushed against a flat wall. 2. Position: Stand on the paper with your heel resting gently against the wall (wearing your preferred running/athletic socks). 3. Mark: Mark the furthest point of your longest toe on the paper with a pencil. 4. Measure: Measure the distance from the edge of the paper (wall) to your mark in Centimeters (CM).
Recommended Fitting Margin:
Casual / Everyday Sneakers: Add +0.5 cm to your measured foot length.
Performance Running: Add +0.5 cm to +1.0 cm for comfortable movement and natural toe expansion.

Asics Signature Fit & Characteristics

Performance Fit Profile: Asics running shoes are engineered for a snug, locked-in feel around the midfoot and heel to ensure maximum stability, with optimal room in the forefoot.
GEL™ Cushioning & Arch Support: Due to structured arch support and GEL™ inserts, performance models may feel slightly snugger out of the box compared to casual sneakers.