Fitness first cross fit workout sand bags are the newest way to add a personalized focus to your strength, stability and speed training sessions. Each sand bag is made of a heavy-duty durable outer shell with 6 convenient handgrips around the exterior. Sand bags include 3 or 5 removable filler bags that hold up to 10lb of sand each. Individual filler bags allow you to fine tune the weight of the sand bag by adding or removing the filler bags to increase or decrease intensity. Each filler bag has a double Velcro closure to ensure the sand stays put. Sand from your local home center is the ideal filler. The 25 pound capacity sand bag has a weight range of 10-30lbs in 3 filler bags. Perfectly suited for beginner to intermediate muscle building and functional strength training. 17" x 6.5"