In addition to the perfect weight, balance and feel, Revgear?s 6' Bag is one of the most durable in the industry. Thanks to expert craftsmanship with heavy-duty vinyl coated nylon and triple stitching, your Heavy Bag will resist scratching, tears and other abrasions ? even mildew. Even after years of abuse, these Heavy Bags will be ready for your hardest kicks and punches. In addition to developing more power, it will help you refine and better focus your strength so your hooks, kicks and other moves are delivered with maximum force. To avoid injury, use boxing gloves, hand wraps or other gear when using the 6' Punching Bag.