On Cloud Swift 3 Brand New Without Box. Size 5. Never been worn. Named for their notably lightweight and agile construction, the Cloudswift 3 trainers from on Running make a reliable choice for inner-city runs. Innovatively crafted with increased forefoot cushioning for a gentle feel against hard surfaces, and detailed with an engineered mesh upper that comfortably cloaks your foot with a sock-like fit, this pair complements your natural motions for smooth strides every time.