Knitting Fabric + Elastic MD Sole Breathable and lightweight mesh upper allows your feet to breathe and ensures the lightweight feature. Ventilating shoes insole which thick to keep a dry, healthy and comfort foot environment. Size Fitness :Here some details about shoes size in our product detail description page,You can choose fit shoes according to the length of your feet. Applications occasion：perfect for casual walking .workout.working.running.outdoor sports.gym tennis.cross training.athletic.indoor hip-pop dance.travel and other activities.