Jumpbox Fitness Join The Kettlebellion Military Green Men's Kettlebell Triblend Workout T-Shirt Short sleeve Premium fit. Athletic cut. Triblend fabric. Ultra-soft, plenty of stretch, great moisture release 50% poly, 25% cotton, 25% rayon Swing that kettlebell in ultimate comfort. Crush your next crossfit WOD, earn the Rx, and set a PR