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An unfilled heavy bag ships as an empty shell, so it costs far less to deliver and you decide exactly how heavy and how firm it ends up. It's the smart buy if you have a pile of old clothes, a tight shipping budget, or a bag shape you can't find filled. The trade-off is an afternoon of packing.
What matters most is the shell (leather lasts longest), the size you need (4-foot boxing bags vs. 6-foot Thai bags), and the weight it's designed to hold once filled. We compared six unfilled bags from Contender Fight Sports, TITLE Boxing, Ringside and Fairtex.
Our top picks at a glance
Quick Picks
- Best Overall: Contender Fight Sports Leather Heavybag - Unfilled. Best for an all-leather boxing bag in a 100 lb or 150 lb size.
- Best Budget: TITLE Boxing Synthetic Leather Heavy Bag (Unfilled). Best for a 14 x 48-inch shell with chains included.
- Best Large Leather: Ringside Unfilled Leather Heavybag, Large. Best for a 16 x 48-inch cowhide bag.
- Best 6-Foot Bag: Fairtex HB6 Muay Thai Banana Bag (Unfilled). Best for kicks and knees, about 40 kg (88 lb) filled per Fairtex.
- Best Leather Thai Bag: Ringside 100-Pound Leather Muay Thai Heavy Bag (Unfilled). Best for a 13 x 72-inch leather Thai bag with a foam liner.
- Best Angle Bag: Fairtex Angle Bag HB12 (Unfilled). Best for uppercuts, hooks and kicks on a tapered bag.
Comparison Table
| Unfilled bag | Best for | Size | Shell | Designed fill weight | Hanging | Amazon |
|---|---|---|---|---|---|---|
| Contender Leather Heavybag | Overall | 14" x 42" (M) / 16" x 48" (L) | Leather | 100 lb (M) / 150 lb (L) | Chain + swivel | Check price |
| TITLE Synthetic Leather (Unfilled) | Budget | 14" x 48" (43" around) | Synthetic leather | Not listed | Chains | Check price |
| Ringside Unfilled Leather, Large | Large leather | 16" x 48" | Cowhide | Not listed | Chain + swivel | Check price |
| Fairtex HB6 | 6-foot bag | ~14" x 6 ft | Syntek leather, nylon lining | About 40 kg (88 lb) | Straps + swivel | Check price |
| Ringside 100 lb Leather Thai | Leather Thai | 13" x 72" | Leather, 1" foam liner | About 100 lb | Chain + swivel | Check price |
| Fairtex HB12 Angle Bag | Angle work | 19.7" x 57.9" (Amazon listing) | Syntek leather, nylon lining | About 60 kg (132 lb) | Straps | Check price |
The Best Unfilled Heavy Bags, Reviewed
Contender Fight Sports Leather Heavybag - Unfilled: Best Overall
Who it's for: Boxers who want a classic leather gym bag and are happy to pack it themselves.
Contender Fight Sports, sold through Ringside, offers this unfilled leather bag in two sizes: medium at 14 x 42 inches, designed for 100 lb, and large at 16 x 48 inches, designed for 150 lb. A chain and swivel are included. Ringside says to fill it according to its size, which gives you a clear target weight rather than guesswork.
The 14 x 42-inch medium is the classic boxing-gym format; the large gives you a broader target for hooks and body shots and more room for low kicks. Leather costs more than synthetic, but it outlasts it on a bag you'll hit for years.
Pros
- Leather shell
- Two sizes with published fill weights
- Chain and swivel included
Cons
- Leather costs more
- Large size needs 150 lb of fill
Contender Fight Sports Leather Heavybag - Unfilled
by Contender Fight Sports
TITLE Boxing Synthetic Leather Heavy Bag (Unfilled): Best Budget
Who it's for: Home boxers on a budget who want a soft, forgiving bag.
TITLE describes this shell as soft synthetic leather that's pliable and "gives" more with every punch. It measures 14 inches across, 48 inches tall and 43 inches around, with a four-panel alternating red and black design that gives you natural target areas. Chains are included.
TITLE doesn't publish a design fill weight, so use our calculator below to choose a sensible target for your body weight and fill gradually. At 48 inches, it's a little longer than the standard 42-inch gym bag, which helps with body shots.
Pros
- Budget tier
- 14" x 48" shell with target panels
- Chains included
Cons
- No published fill weight
- Synthetic shell wears sooner than leather
TITLE Boxing Synthetic Leather Heavy Bag (Unfilled)
by TITLE Boxing
Ringside Unfilled Leather Heavybag, Large: Best Large Leather
Who it's for: Bigger boxers who want a wide cowhide target.
Ringside's large unfilled bag is 16 x 48 inches in cowhide leather, and it comes with a heavy bag chain and swivel. That's two inches wider than the standard 14-inch bag, which spreads your fill over more volume and gives a bigger face for hooks.
The listing doesn't state a design fill weight, so confirm one with Ringside before you fill it, and don't go past it. One owner reported that the belt detail around the lower bag was nylon rather than leather, so don't count on cosmetic details matching the photos exactly.
Pros
- Cowhide leather
- Wide 16" x 48" target
- Chain and swivel included
Cons
- Design fill weight not listed
- Premium tier
Fairtex HB6 Muay Thai Banana Bag (Unfilled): Best 6-Foot Bag
Who it's for: Kickboxers and Muay Thai students who want a full-length bag from a Thai brand.
The HB6 is Fairtex's classic 6-foot banana bag, about 36 cm (14 inches) across. The shell is Syntek leather with a heavy-duty, water-resistant, non-tear nylon lining, and it hangs from straps with a swivel. Unfilled, it weighs about 5.2 lb; Fairtex says it weighs about 40 kg (about 88 lb) once filled.
That 6-foot length takes punches, kicks, knees and elbows. Filling it evenly is the hard part: a 6-foot bag swallows a lot of fabric, and soft spots at the bottom are rough on shins. Pack it in compressed layers and keep the lower third firm. Our Muay Thai heavy bag guide covers the ceiling height a 6-foot bag needs.
Pros
- Full 6-foot length for kicks
- Water-resistant nylon lining
- Published filled weight
Cons
- Takes a lot of material to fill
- Needs a tall ceiling or stand
Ringside 100-Pound Leather Muay Thai Heavy Bag (Unfilled): Best Leather Thai Bag
Who it's for: Thai boxers who want leather and are willing to pack a long bag.
Ringside's leather Thai bag ships unfilled. The Amazon listing gives it as 13 x 72 inches with a leather outer, a 1-inch closed-cell foam liner, a chain and swivel, and a D-ring at the bottom for anchoring. Filled, it's a classic banana-style bag of about 100 lb.
The foam liner helps smooth out minor unevenness in your packing, which matters on a bag you'll kick. Ringside's own site has listed a slightly shorter length for its leather Thai bag, so confirm the dimensions on the listing before you plan your ceiling height.
Pros
- Leather shell
- 1" closed-cell foam liner
- Bottom D-ring for anchoring
Cons
- Dimensions vary between listings
- Long bag takes time to pack
Ringside 100-Pound Leather Muay Thai Heavy Bag (Unfilled)
by Ringside
Fairtex Angle Bag HB12 (Unfilled): Best Angle Bag
Who it's for: Boxers and Thai boxers who want to work uppercuts, hooks and kicks on one bag.
Fairtex's HB12 is a tapered angle bag in Syntek leather with a heavy-duty, water-resistant, tear-proof nylon lining. Fairtex says its balanced weight keeps it steady with minimal swing and that it takes punches, high and low kicks and teeps. It weighs about 60 kg (about 132 lb) once filled; the Amazon listing gives it as 19.7 inches wide and 57.9 inches tall.
The angled face gives you somewhere to land uppercuts, which a straight cylinder can't. The catch is fill volume: at about 60 kg filled, it's the heaviest bag here to pack, and you'll need a mount and hardware rated well above that. See our uppercut bag guide for more angled options, including filled ones.
Pros
- Angled face for uppercuts
- Takes kicks and punches
- Water-resistant nylon lining
Cons
- About 60 kg of fill needed
- Heavy-duty mount required
Unfilled Heavy Bag Buying Guide
Why buy unfilled?
- Shipping: an empty shell weighs a few pounds instead of 70 to 150, so it's cheaper and easier to deliver.
- Control: you choose the weight and firmness.
- Recycling: old clothes and fabric scraps get a second life.
Why not?
- Time: packing a bag evenly takes hours, longer for a 6-foot bag.
- Material: you need a lot of fabric, and sand if you want extra weight.
- Consistency: poor packing leaves hard and soft spots that are rough on hands and shins. Factory-filled bags are evenly machine-packed.
What to fill it with
The proven recipe is tightly packed shredded fabric or old clothes, with a few sealed bags of sand in the center if you need more weight. Remove zippers, buttons and other hard parts. Never use loose sand alone; it settles into a rock-hard bottom and can leak through seams. Our guide to what punching bags are filled with walks through TITLE Boxing's step-by-step method.
How heavy to fill it
Fill to the weight the bag was designed for, never more. Contender's unfilled bags are designed for 100 lb (medium) and 150 lb (large); Fairtex publishes filled weights for its bags. If the maker doesn't give a figure, pick a weight that suits you: a common starting point is about half your body weight, adjusted for your goals.
Punching bag weight calculator
Starts from half your body weight, then adjusts for your goal and experience and rounds to sizes that are actually sold.
Sources: half-body-weight rule as stated by Everlast and Hayabusa; Everlast heavy bag sizing chart; Hayabusa bag guide. Bag lengths from the Everlast, Ringside and TITLE Boxing listings cited in our guide. Free-standing bags follow base weight instead. This is a starting range, not a prescription.
Size: 4-foot vs. 6-foot
A 42 to 48-inch bag is a boxing bag; it's easier to fill and needs less ceiling height. A 6-foot bag adds targets for kicks and knees, but it needs far more material and more vertical room. If you'd rather skip the packing, factory-filled bags come in both formats.
Leather vs. synthetic
Leather (Contender, Ringside) lasts longest and feels best, at a higher price; our leather heavy bag guide compares filled leather bags. Synthetic shells (TITLE, Fairtex's Syntek) are tougher than they used to be, easier to clean and cheaper.
Hanging an unfilled bag once it's full
Once filled, your bag is as heavy as any factory bag. Use a hanger, spring, swivel and connectors each rated above its filled weight, mount only into a solid joist or steel beam (never drywall), and have a contractor check the structure if you're unsure. Our guides to hanging a punching bag from the ceiling and heavy bag springs and swivels cover the hardware.
Filling time-savers
- Collect material first. Gather more old clothes and fabric scraps than you think you need before you start; stopping halfway leaves a soft layer.
- Cut big items down. Jeans and jackets pack better in smaller pieces, with zippers, buttons and rivets removed.
- Fill on a bathroom scale. Weigh the bag every few layers so you hit your target weight instead of guessing.
- Pack in thin, compressed layers. Push each layer down hard with a pole or your fist before adding the next.
- Seal and center the sandbags. Put sand in heavy-duty zip bags, double-bag them and keep them in the middle, surrounded by fabric.
- Hang it, hit it, top it up. Fabric settles after the first sessions. Plan to open the bag and add more after a week or two.
How We Chose
We researched these bags rather than testing them. Sizes, materials and fill weights come from manufacturer and official seller pages (Ringside for Contender and its own bags, TITLE Boxing and Fairtex) and the bags' Amazon listings, and we've noted where listings disagree. We picked bags sold unfilled with clear dimensions, covered both boxing and Thai formats, and weighed recurring owner feedback on packing, seam strength and hardware.
FAQ
Is it worth buying an unfilled heavy bag?
It can be. Unfilled bags ship far lighter, so delivery is cheaper and easier, and you control the weight and firmness. The catch is filling: packing 70 to 100-plus pounds of material evenly takes time and a lot of fabric. If you want to hang it the day it arrives, buy filled.
What do you fill an unfilled heavy bag with?
Mostly shredded fabric or old clothes, packed tightly in layers, with a few sealed bags of sand in the center for extra weight if needed. Remove zippers and buttons first. Never use loose sand on its own; it settles into a rock-hard bottom.
How much fabric does it take to fill a heavy bag?
More than most people expect. A bag meant for about 100 lb of fill needs roughly that weight in packed fabric and sand. Gather far more old clothes than you think you'll need, and weigh as you go.
How heavy should I fill my unfilled bag?
Fill to the weight the manufacturer designed the bag for, not more. Ringside, for example, says its unfilled Contender bag should be filled to 100 or 150 lb depending on its size. Overfilling strains the seams and straps.
Can you fill an unfilled heavy bag with water?
Not unless it's designed as a water bag. Regular heavy bags aren't waterproof, and water would leak, rot the fill and add mold. Water bags like Aqua Training Bag's are sealed vinyl shells built for it.
Verdict
The Contender Fight Sports Leather Heavybag is the best unfilled heavy bag for most boxers: all leather, two sizes and a clear target weight for each. On a budget, TITLE's synthetic 14 x 48-inch shell does the job, and kickers should look at Fairtex's 6-foot HB6. Whichever you choose, fill it to its design weight and check our punching bag weight guide if you're unsure what that should be.