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Techknit RNR-1
The Techknit RNR-1 Trainer is TYR's knit-upper cross-trainer — built for athletes who want responsive cushioning and breathable comfort in a versatile gym shoe. Powered by SurgeNRG+ supercritical foam, the RNR-1 delivers responsive cushioning, shock absorption, and energy return through every training session. The breathable 3D knit upper wraps the foot in a lightweight, adaptive construction that moves with you through every rep, set, and stride. The flexible sole allows natural foot movement across training surfaces.