J. Frame™ technology provides dynamic stability enhanced cushioning. Breathable mesh upper offers maximum ventilation. High. abrasion rubber outsole delivers excellent traction durability. Plush collar tongue provide added comfort. Extended heel pull tab for easy on off. Zonal rubber for increased durability underfoot. Lace. up closure. Zonally engineered flat knit upper offers improved midfoot lockdown. Stretchy dual gusset under the lace line prevents discomfort caused by tongue migration. Material: The Hoka Clifton running shoes feature a breathable engineered mesh upper a lightweight responsive foam midsole a durable rubber outsole.. on Tag: 9.