What Neck Weights Do and Why Spearfishers Use Them
Neck weights are lead or steel collars worn around the shoulders and upper chest to offset buoyancy and help you descend more efficiently underwater. They sit on your trapezius muscles and distribute weight across a wide area, which keeps your body balanced and reduces strain on any single point.
Most spearfishers use neck weights instead of a belt because they stay in place during movement and don't shift when you bend or rotate your torso. The weight rides higher on your body than a belt would, which helps counteract the buoyancy of your head and chest — the areas that tend to float most. This matters because fighting buoyancy in those zones wastes energy and makes it harder to hold depth or move smoothly through the water.
Neck weights are especially useful if you wear a thick wetsuit, have naturally high body fat, or spend time in cold water where you need extra insulation. They're also common in freediving and breath-hold spearfishing, where every bit of efficiency counts and you can't afford to waste air or energy fighting to stay down.
Key Takeaways
- Neck weights distribute load across your shoulders and upper chest, keeping your body balanced and reducing the strain on your lower back compared to a weight belt alone.
- Lead neck weights are denser and more compact than steel, so you need less volume to reach the same weight, but steel is more durable and doesn't require the same care in storage.
- Most neck weights range from 2 to 8 pounds and fasten with velcro, buckles, or quick-release clips so you can remove them quickly if you need to.
- Pairing a neck weight with a belt weight system gives you finer control over buoyancy and lets you adjust your total weight without carrying everything on your hips.
- A neck weight that's too heavy will tire your neck and shoulders; start light and add weight only if you're still fighting buoyancy after adjusting your belt.
Lead Versus Steel Neck Weights
Lead neck weights are the standard choice because lead is dense — you get significant weight in a small, compact package. A 5-pound lead collar takes up far less space than a 5-pound steel one, which means less bulk around your neck and shoulders. Lead also doesn't rust or corrode, so it lasts a long time with minimal maintenance. The trade-off is that lead requires careful handling; you should store it away from children and pets, and some regions have restrictions on lead products.
Steel neck weights are heavier per unit volume, meaning they're bulkier for the same weight, but they're non-toxic and durable. Steel can rust if exposed to freshwater without rinsing, so you'll need to rinse and dry your steel weights after each use. They're a solid choice if you want to avoid lead entirely or if you plan to use the weights in freshwater environments where rust is a concern.
Most spearfishers choose lead for saltwater use because the compact size and zero maintenance make it the practical option. If you dive in freshwater regularly or prefer non-toxic materials, steel works just as well — you'll just need to rinse and dry it more carefully.
Fastening Systems and How to Wear Them
Neck weights fasten in three main ways: velcro straps, buckle closures, and quick-release clips. Velcro is the most common because it's simple, adjustable, and lets you tighten or loosen the fit without removing the weight. Buckle closures are more secure and don't wear out like velcro can, but they take longer to fasten and unfasten. Quick-release clips are designed for emergency situations — you can drop the weight instantly if you need to surface fast.
To wear a neck weight correctly, place it so it sits evenly across your shoulders and upper chest, not bunched to one side. The weight should rest on your trapezius muscles, not on your neck itself — if it's pressing on your throat or collarbone, it's positioned too high. Tighten the straps snugly enough that the weight doesn't slip during movement, but not so tight that it restricts your breathing or circulation. You should be able to fit one finger under the strap comfortably.
Most divers wear a neck weight over their wetsuit but under their harness or buoyancy compensator, so the weight stays stable and doesn't move around. Some prefer to wear it directly against their skin under the suit, which keeps it even more secure but can be uncomfortable in very cold water.
Choosing the Right Weight for Your Body and Gear
Neck weights typically range from 2 to 8 pounds, though some manufacturers make heavier or lighter options. The right weight depends on your body composition, the thickness of your wetsuit, water temperature, and how much weight you're already carrying on your belt. A good starting point is 2 to 3 pounds if you're new to neck weights — this is light enough that it won't tire your neck and shoulders, but heavy enough to make a noticeable difference in buoyancy.
If you wear a 5mm or thicker wetsuit, you'll need more weight overall, and a neck weight of 4 to 6 pounds is common. In cold water with a thick suit, some spearfishers use 7 or 8 pounds. The key is to test in shallow water first: put on your full gear, add your neck weight, and see if you can hold neutral buoyancy at a comfortable depth without fighting to stay down or kicking to stay up.
Remember that a neck weight is meant to supplement your belt weight, not replace it. If you find yourself needing more than 8 pounds on your neck, you're probably better off adding weight to your belt instead. Carrying too much weight on your neck will fatigue your neck and shoulder muscles, which can lead to poor form and reduced diving time.
Combining Neck Weights With Belt Systems
Most experienced spearfishers use both a neck weight and a belt weight system together. The belt carries the bulk of your weight and sits low on your body, while the neck weight handles the buoyancy of your head and chest. This split approach gives you better balance and control — your body stays more horizontal in the water, and you don't have to fight to keep your head down or your feet up.
A typical setup might be 4 to 6 pounds on the neck and 8 to 15 pounds on the belt, depending on your size, suit thickness, and the depth you're diving. The exact split is personal — some divers prefer more weight on the neck, others prefer more on the belt. The advantage of splitting the load is that you can fine-tune your buoyancy by adjusting one or the other without carrying a huge amount in one place.
If you're using a quick-release belt system, make sure your neck weight has a secure fastening that won't come loose if you have to dump your belt in an emergency. Velcro and buckles are fine for this; quick-release clips on the neck weight itself are even better because you can drop it independently if needed.
Maintenance and Storage
Lead neck weights need very little maintenance — rinse them with fresh water after saltwater use to remove salt residue, and dry them completely before storing. Store them in a cool, dry place away from children and pets. Lead doesn't corrode, so you don't need to worry about rust or deterioration over time.
Steel neck weights should be rinsed and dried immediately after each use, especially in saltwater. If you notice any rust spots forming, you can scrub them lightly with a soft brush or steel wool and apply a thin coat of oil to prevent further corrosion. Store steel weights in a dry location, and consider wrapping them in a cloth or storing them in a sealed container if you live in a humid climate.
Check the velcro or straps regularly — velcro loses grip over time and may need to be replaced after a season or two of regular use. Most manufacturers sell replacement velcro strips or strap kits separately, so you can refresh your weight without buying a new one. Buckles and clips should be inspected for cracks or corrosion and replaced if they show signs of wear.
Common Mistakes and How to Avoid Them
The most common mistake is wearing a neck weight that's too heavy. Divers often think more weight means better control, but an overloaded neck will tire your muscles quickly and throw off your body position. Start with 2 to 3 pounds and add weight only if you're still fighting buoyancy after adjusting your belt. Your neck should feel supported, not strained.
Another mistake is positioning the weight too high on your neck or collarbone. This restricts blood flow and breathing and can cause discomfort or dizziness. The weight should sit on your shoulders and upper back, distributed evenly across both sides. If one side feels heavier than the other, loosen the straps and reposition the weight until it's balanced.
Some divers forget to rinse their weights after saltwater use, which can lead to salt buildup and corrosion over time. Even lead can develop a white crusty coating if salt is left to dry on it. A quick rinse takes 30 seconds and extends the life of your weight significantly. If you use steel weights, rinsing and drying immediately is essential to prevent rust.
Frequently Asked Questions
Can I use a neck weight if I'm a beginner spearfisher?
Yes, but start with a light one — 2 to 3 pounds — and practice in shallow water first. A neck weight can actually help beginners because it improves body position and reduces the effort needed to stay at depth. Make sure you're comfortable with your basic diving skills before adding extra weight to your body.
What's the difference between a neck weight and a weight belt?
A weight belt carries most of your weight low on your hips, while a neck weight sits on your shoulders and upper chest. They work together: the belt handles overall buoyancy, and the neck weight keeps your head and chest from floating up. Using both gives you better balance than either one alone.
Will a neck weight make my neck sore?
Not if it's the right weight and positioned correctly. A properly fitted neck weight should feel like a light pressure across your shoulders, not a strain on your neck muscles. If you feel soreness or fatigue in your neck after diving, your weight is probably too heavy or positioned too high — try reducing the weight or repositioning it lower on your shoulders.
Can I wear a neck weight over my wetsuit or does it have to go under?
Either works, but most divers wear it over the suit because it's easier to adjust and stays more stable. Wearing it under the suit keeps it even more secure but can be uncomfortable in very cold water. Choose whichever feels more secure and comfortable for your setup.
Do I need a quick-release clip on my neck weight?
It's not required, but it's a good safety feature if you're diving in challenging conditions or at significant depth. A quick-release clip lets you drop the weight instantly if you need to surface fast. For shallow recreational diving, a standard velcro or buckle closure is fine as long as it's secure and won't come loose during normal movement.