ASICS Gel-Kayano™ 31 Women's Running Stability Trainers. Built with maximum support and comfort in mind, the GEL-KAYANO™ 31 offers a secure, stable ride every time you hit the road, so you can run further for even longer. The revolutionary 4D GUIDANCE SYSTEM™ delivers adaptive, on-demand stability that guides your foot through every step, for a more comfortable, balanced run from footstrike to toe-off. A full-length FF BLAST™ PLUS foam midsole supplies premium lightweight cushioning for reduced impact on your joints, while the PureGEL™ technology unit at the heel improves absorption as your foot hits the ground, creating a softer landing on every stride. End use: Running. Available in sizes 3-8. Weight: 266g (size U.K. 6). Midsole drop: 10mm (heel: 39mm, forefoot: 29mm). Features an engineered mesh upper for enhanced ventilation and a durable Hybrid ASICSGRIP™ outsole for advanced traction. Secure knit collar construction with pull tabs for easy on-off and an OrthoLite X-55 sockliner improves comfort. Reflective details offer visibility in low-light conditions. Material Content: Synthetic Fiber Pu. Revolutionary 4D GUIDANCE SYSTEM technology delivers adaptive stability when you need it most, so you can run longer. New PureGEL technology increases softness and shock absorption to reduce impact on joints and allow you to run in comfort. FF BLAST PLUS ECO foam offers a softer foothold and enhanced cushioning for maximum comfort even on the hardest surfaces.