This fits your .

Workout at the beach with the Mobile Muscle Portable Weights!!!! Strength, Flexibility & Endurance. Hold bag with strap facing you. Grab far edge that has PA board inside Hold ends of PA board and scoop sand, fill to desired weight mark on the bag. 8-15lbs Fold in sides and roll down & wrap Velcro strap through handle and pull tight to close. MOBILE MUSCLE TECHNOLOGY Have you ever wanted to run on the beach, but wanted to lift too? Well now you can! Mobile Muscles roll up very small and allow you to run with them in your hand or even in your pocket. The innovative strap allows you to wrap and secure your Mobile Muscles around anything. Your bike. Your water bottle. You name it. Simply fill your Mobile Muscle by scooping up 8-15lbs of sand, roll shut and strap closed. Complete our total body workout or create your own. Mobile Muscle uses fluid exercise movements that will not stress your body and provide a more challenging workout while you work on your tan too.

Petego Mobile Muscle Fitness Sandbag Workout Set - BXJ2LWN06