Nike mercurial victory cr7 astro turf trainers junior the nike mercurial victory cr7 astro turf trainers are designed to be worn on synthetic pitches and offer comfort support and cushioning around the foot the trainers feature a synthetic upper construction to allow close control whilst the rubber stud outsole allows for good grip on synthetic surfaces astro turf trainers junior full lace fastening cushioned insole shaped ankle collar tongueless design texture