Sandbags and Weight Vests

Sandbags are no rigid weights like barbells or kettlebells. Their form can change during the exercise because the filling moves around during the movement. Your body has to compensate this movement actively. The stabilizing musculature is challenged more and the muscular adaptation for sports and daily life increases.

Weight training with sandbags – every movement is a new challenge

Effective training due to instability

Sandbags are instable weights that are filled with a freely moving load. When it comes to strength training, many athletes simply stack on heavier and heavier loads. Studies have shown, however, that the instability of a training weight and one’s own position is more important in regards to muscle stimulation than the weight itself. An instable weight creates more neuromuscular impulses and promotes more muscular adaptation than increasing the weight. Turns out, less really is more at times.

For better performance

Training with sandbags has a very good transfer to other sports and daily physical situations. Often times, you have to create power in situations where you have no perfect footing, outside influences impact your body or the object that you have to move doesn’t have an evenly distributed weight. Every repetition with the sandbag activates your muscles slightly differently. The high coordinative demands in sandbag training challenge your core muscles and teach you to generate enough power and body tension in every situation. This makes sandbags the embodiment of functional training.

Huge exercise variety

Sandbag training offers a versatile training that ranges from classic movements like deadlifts to swing exercises. Add barbell and kettlebell exercises, together with instability of the training weight – and you have sandbag training.

Video on blackPack sandbag and weight vest

From 5 to 30kg (66 lb) of training weight

Depending on sandbag model

The most versatile sandbags

There are different versions of sandbags. Common sandbag models sometimes let you change the training weight and ideally offer different handles. The so-called bulgarian bags have special handles that make them perfect for swing exercises but they won’t let you change the training weight. The blackPack sandbags combine both sandbag versions in one tool. The Loading-Bags let you choose and change the training weight freely, even during your workouts. The different handles allow for a versatile training in which you can vary the same exercise with different grips. The special baton handles are perfect for swing exercises and train your grip strength.

With water filling

A key feature of the blackPack sandbags is the fact that you can fill every model with water, too. The Loading-Bag AQUA turns your sandbag into an aquabag and training will become even more intense. The water never stands still and you need a great amount of strength and coordination to stabilize the blackPack. Especially your core strength is challenged and the interplay of the involved muscle groups is greatly improved. By the way, you don’t need a pump for the Loading-Bag AQUA. Wherever you have access to water you can fill the blackPack without any accessories.

Various possibilities

The different handles allow for a multitude of single and double-handed exercises. Additionally, the baton handles can be connected to our aeroSling sling trainers. You can also simply hold the blackPack by its shell. This trains your grip strength and gives you even more exercises.

High quality

The sandbags by blackPack can be used indoors and outdoors. The durable materials withstand any wind and weather, the reinforced seams guarantee longevity.

blackPack VEST

The 6-in-1 weight vest

Increase your bodyweight

Weight vests are an effective tool to make bodyweight training more challenging. The vests increase your bodyweight and, thus, the training resistance in exercises like squats, dips, and pull-ups.

Quick weight adjustment

Often times, weight vests come with fixed weight bags that can only be accessed from the inside. The blackPack VEST does it differently. For one thing, the 6 weight bags can be filled freely. With sand you can reach a total weight of up to 10 kg (22 lb), with steel shots you can even go as high as 25 kg (55 lb). And for another thing, you can remove the weight bags from the outside when you don’t need the same weight for a different exercise. You don’t have to take off the vest to change the weight. Thus, you have 6 weight vests in one.

Easy to clean

The side parts of the blackPack VEST are open to allow for good air circulation. The inner surface is made from PVC and can be cleaned easily with a wet cloth. This prevents the typical odour development of other weight vests.

Available in 5 – 25 kg

You have the choice: you can order the unfilled vest or we can fill it for you so you can start your bodyweight training right away.

Testimonials – here’s what experts and fans say

The blackPack is used daily in our functional training sessions and boot camp courses. The blackPack gives us the opportunity to simulate everyday life movements with free weights. Bodybuilders, endurance athletes, and patients with chronic back pain all value training healthy and effective movement patterns.

The blackPack is a must-have for every personal trainer.

Gregor AkkermanMein Körper - Sportwissenschaftliche Lösungen

The movement of the water forces the body to compensate constantly and this is something that is something that has proved successful in my personal training with professional athletes. In contrast to common weight training at machines, the water won’t let you cheat to complete the rep.

A compensation with the stronger side is impossible and, thus, there will be no one-sided load.

Gilbert KirchenmayerGilbert Sports Coaching

I have just received my blackPack Pro sandbag, awesome awesome awesome piece of kit. Thanks for all the development effort leading to it’s creation.

Customer Wayne G. 16.3.2017 UKAfter he received his order

Training Focus

Sandbags mostly train your coordination and strength. The instable training weight will challenge you like nothing before.


FAQ – frequently asked questions

The blackPack is filled indirectly, i.e. you fill the included Loading-Bags and put them inside the blackPack. You can also fill the blackPack directly, of course, or use other materials (plastic bottles, rubble without sharp edges, steel shots) which is a great option when you are on the road.

As mentioned before, the blackPacks are loaded with Loading-Bags. There are two different versions of the Loading-Bag, the Loading-Bag SAND and the Loading-Bag AQUA. The former can be filled with sand or similar material, the latter is designed for water only. You can also fill the blackPack directly without using a Loading-Bag.

No. Whether you put one Loading-Bag AQUA or up to three Loading-Bags SAND (depending on the size of the blackPack version) into your blackPack makes no difference to the blackPack. For your training, however, it will make a huge difference. For the blackPack ESY S and M you have to use the respective Loading-Bag AQUA size.

All blackPacks offer several handle variations. All sizes have two parallel handles, two baton handles, and two handles on the sides. Due to their smaller size, the blackPack ESY S and M have one central horizontal handle while the blackPack ESY L and PRO have two horizontal handles. The blackPack PRO is the only blackPack that also has two carrying handles on the top.

The maximum load of the blackPack is directly proportional to its size. The blackPack ESY S, for example, can be filled with up to 10 kg (22 lb), the bigger sizes are tiered in 10 kg steps:

  • blackPack ESY S: 10 kg / 22 lb
  • blackPack ESY M: 20 kg / 44 lb
  • blackPack ESY L: 30 kg / 66 lb

You can also use Steel Shots to keep the volume to a minimum. The maximum weights, however, should not be exceeded. When using the Loading-Bag AQUA we also recommend not to exceed the given weights. Here, you also have to take into account that the mixture of air and water can increase the volume in a way that it only allows lighter training weights. The higher instability in return makes up for the lighter training weight.

Every blackPack version has two baton handles on the sides with one connector loop on each end. This can be used to connect with the grip carabiner of the aeroSling ELITE sling trainer.

The blackPack PRO is well suited as pulling/dragging weight. Thus, it can also be used in connection with a Battle Rope to be pulled over greater distances.

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