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It’s the perfect two-sided shirt for runners, cyclists, triathletes, and endurance athletes who understand that staying easy can require more discipline than going hard.\u003cbr\u003e\n\u003cbr\u003e\nTwo-Sided Design\u003cbr\u003e\nHeart Rate Jail courtroom artwork on the front\u003cbr\u003e\n“I Sentence You to Heart Rate Jail” speech bubble\u003cbr\u003e\nHeart locked behind bars on the back\u003cbr\u003e\nBased on a Zone 2 training protocol\u003cbr\u003e\nMade for athletes disciplined enough to let somebody pass\u003cbr\u003e\nT-Shirt Details\u003cbr\u003e\n100% combed and ring-spun cotton\u003cbr\u003e\nHeather colors contain polyester\u003cbr\u003e\nFabric weight: 4.2 oz.\/yd.² (142 g\/m²)\u003cbr\u003e\nPre-shrunk fabric\u003cbr\u003e\nSide-seamed construction\u003cbr\u003e\nShoulder-to-shoulder taping\u003cbr\u003e\nSoft, lightweight fabric with comfortable stretch\u003cbr\u003e\nBlank product sourced from Nicaragua, Mexico, Honduras, or the United 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