How to Fill a Leather Punching Bag?
How to Fill a Leather Punching Bag
Step-by-step guide to filling your unfilled leather heavy bag — the right materials, the right weight, and how to get the firmness your training actually needs.
Staghide Training Guide · 8 min read · Boxing & MMA
Staghide punching bags are delivered unfilled. That's intentional — it gives you full control over the weight and firmness of your bag so you can tailor it exactly to your training style, your weight class, and how hard you hit.
But filling a punching bag properly takes more than just stuffing it with whatever's available. The wrong filler makes a bag too hard, too soft, or unbalanced — and that affects your training and your joints. This guide covers everything you need to get it right the first time.
"The bag you fill yourself is the bag that fits your training. Too light and it swings wild. Too hard and it breaks your hands. Get it right and it becomes the best training partner you've ever had."
— Staghide Gravestone Heritage leather punching bag — 100% full-grain cowhide, delivered unfilled
Before You Start: What You Need
Before filling your bag gather everything together. Having the right tools makes the process faster and gives you a better result.
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01Your Filler MaterialOld clothes, fabric scraps, rags, or purpose-made bag filler. We cover the best options in detail below.
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02A Bathroom ScaleTo weigh the bag as you fill it. Most fighters use 25–70kg depending on their weight class and training intensity.
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03A Wooden Dowel or Broom HandleFor packing and compressing the filler material down as you go. Essential for even density throughout the bag.
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04A Hanging PointHave your ceiling mount, chain, and swivel ready before you start filling — a full bag is significantly harder to hang than an empty one.
— Filler material options: old fabric and rags work best; sand adds weight; sawdust and rice husks create a firmer feel
Best Filler Materials for a Leather Punching Bag
The filler material determines how the bag feels to hit, how heavy it gets, and how it holds up over time. Here are the most common options and how they perform:
The go-to filler for most fighters. Soft enough to protect your hands and wrists, dense enough to give real resistance. Tear into strips and pack tightly. Free if you raid old wardrobes.
Adds serious weight quickly. Never use sand alone — always mix with fabric. Pure sand creates an unnaturally hard bag that will damage your hands and wrists over time.
Creates a denser, firmer bag. Good for power training. Mix with fabric — pure sawdust compresses too hard and can crack the leather from inside over time.
Lightweight, cheap, and easy to source. Gives a medium-firm feel. Can shift and settle unevenly over time — pack tightly and check regularly.
The best bags are filled with a mix — 70% fabric scraps, 20% sand, 10% sawdust. The fabric provides cushion, the sand adds weight, and the sawdust firms it up. Adjust the ratio based on how hard you want the bag to feel.
— Packing fabric material into the bag — compress each layer firmly before adding the next
How to Fill Your Punching Bag: Step by Step
Follow these steps in order. Rushing the filling process leads to an uneven bag that swings poorly and wears unevenly.
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01Prepare Your FillerTear old clothes and fabric into strips roughly 15–20cm long. Smaller pieces pack more densely and create a more even fill. Remove any buttons, zippers, or hard objects that could damage the leather interior.
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02Start at the BottomFeed the first layer of fabric through the opening at the top of the bag and push it to the very bottom. Use your dowel to compress it firmly. A dense base prevents the bag from developing a soft bottom that swings unpredictably.
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03Pack in LayersAdd filler in 10–15cm layers, compressing firmly with your dowel after each one. Don't rush this. Loose packing leads to a bag that settles unevenly and develops hard and soft spots within weeks.
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04Add Sand GraduallyIf using sand for weight, mix it in with fabric layers at roughly 20% of each layer — never in a solid block. Solid sand layers create an unnaturally hard hitting surface that damages joints.
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05Weigh as You GoEvery 10kg of fill, hang the bag temporarily and check the weight on a scale. Target weight guide: 25–35kg for beginners and speed work, 35–50kg for intermediate training, 50–70kg for heavy power work.
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06Seal and HangOnce you've reached your target weight and the bag feels evenly packed from top to bottom, close the opening securely. Hang the bag and give it 5–10 light hits to check for any uneven spots. Let it settle for 24 hours before your first full session.
How Heavy Should Your Punching Bag Be?
The right weight depends on your bodyweight, training goals, and experience level. A bag that's too light swings away on every hit and gives you nothing to work against. Too heavy and you're fighting the bag instead of training on it.
Ideal for learning combinations, footwork, and building speed. Light enough to give feedback on technique without absorbing all your power.
The most popular range. Good balance of resistance and movement. Suits most fighters training combinations and power simultaneously.
For serious power training and heavyweight fighters. The bag stays put on big shots, forcing you to work harder on each combination. Not recommended for beginners.
A simple starting point — fill your bag to approximately half your own bodyweight. Adjust up or down based on training intensity and goals.
After Filling: Bag Maintenance
Filling the bag is a one-time job but maintaining it keeps it training-ready for years. Full-grain leather is durable but needs basic care to stay in top condition.
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01Check for SettlingAfter the first two weeks of training, the filler will compress and settle. Top up through the opening if needed to maintain your target weight and density.
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02Wipe Down After SessionsSweat and moisture break down leather over time. Wipe the exterior with a dry cloth after every session. Never leave it wet.
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03Condition the LeatherApply a quality leather conditioner every 3–6 months. Full-grain cowhide is thirsty — conditioning prevents cracking and keeps the exterior supple through years of hard use.
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04Rotate the BagIf you always hit from the same side, one face of the bag wears faster than the other. Rotate the bag 180° every few months for even wear across the full surface.
Related Reading
What Is Full-Grain Leather?
Understand why full-grain cowhide outlasts every other material — and why it matters for training equipment that takes real punishment.
Read the Guide →Ready to Train? Built to Take It.
Every Staghide punching bag is handcrafted from 100% full-grain cowhide. Delivered unfilled so you control the weight. Built to outlast years of hard training.
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