Develop strength and endurance using the Everlast Extreme core bag featuring a rugged construction for long-lasting durability and added safety. The bag weighs 5kg (11lbs) and has been designed for personal training, as well as strength and power training. It is a great choice for boot camps and can be used both indoors and outdoors. The bag is produced from heavy-duty synthetic leather and comes pre-filled. This versatile training tool helps to improve cardiovascular health and offers an elongated shape and multiple handles to ensure a wide variety of exercises. Top Features: -Ideal for: cross fitness & boot camp training -Versatile handles for different lifts front -Heavy Duty Polypropylene Straps U INSIDE FILLING : Cotton filling + stones packet in heavy GSM polyester pockets (for weight) placed in mid of cotton block and comes with inside EPE Foam lined jacket which offers resilient impact and shock absorption