6 Best Climbing Slings For Cargo Netting To Build Lofts

Building a cargo net loft is one of the most effective ways to reclaim vertical space in a tiny home or van conversion, turning an empty void into a functional relaxation zone. Because these nets are intended to support human weight, the structural integrity of the mounting slings is just as critical as the netting itself. Selecting the right climbing slings ensures that the loft remains a safe, long-term feature rather than a precarious architectural experiment.

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Black Diamond Dynex Runner: Best Overall

The Black Diamond Dynex runner strikes the perfect balance between strength, weight, and versatility, making it the industry standard for cargo net installations. Dynex is a high-density polyethylene material that offers incredible abrasion resistance, which is essential when the runner is threaded through repetitive net loops or over mounting hardware.

These runners maintain a high strength-to-weight ratio, ensuring the loft can support dynamic loads without excessive sagging over time. Because the material is stiffer than nylon, it holds its shape well during the initial rigging process, which simplifies the tedious work of weaving a net.

If a reliable, high-performance sling is the priority, this is the definitive choice. It is the gold standard for those who value peace of mind and want a product that excels in every structural category.

Metolius Open Loop Sling: Best Budget Option

For projects where the budget is tight but safety cannot be compromised, the Metolius Open Loop sling is the logical selection. These slings use high-quality nylon webbing, which is exceptionally easy to handle and knot if necessary. While they are slightly bulkier than premium synthetic alternatives, they offer excellent shock absorption and a forgiving nature during installation.

The affordability of these slings allows for a higher quantity of attachment points, which is often more important for load distribution than the strength of a single expensive sling. By installing more points, the stress on any individual anchor is reduced, effectively increasing the safety margin of the entire loft system.

This option is perfect for the builder who wants to maximize the number of attachment points without breaking the bank. It is a workhorse component that proves durability does not always require a premium price tag.

Petzl St’Anneau Sewn Runner: Most Durable

The Petzl St’Anneau stands out for its high-denier construction and robust, reinforced stitching, making it the top choice for high-traffic loft areas. The design utilizes a hybrid composition that resists fraying, even when exposed to the friction of constant movement or shifting cargo.

Consistency is the hallmark of the Petzl manufacturing process. Each runner is factory-tested to ensure that the rated strength is uniform across every batch, providing a level of reliability that is essential for structural overhead installations.

This runner is recommended for users who plan to use their loft daily or for families with children where durability is non-negotiable. It is an investment in longevity, ensuring that the critical points of the loft remain intact for years to come.

Trango Low Bulk Sling: Sleekest Low-Profile

In small-space design, aesthetics and clearance are often major hurdles. The Trango Low Bulk sling is engineered with a slim profile that disappears into the background, making it ideal for minimalist interiors where bulky gear is an eyesore.

Despite the thin profile, these slings retain a high strength rating, proving that size is not always a proxy for structural capacity. Their low mass makes them incredibly easy to tuck behind trim or conceal within structural gaps, maintaining the clean lines of a modern loft design.

Choose this sling if the goal is a seamless, professional look where the hardware should be felt but not seen. It is the superior option for high-end conversions where visual clutter is as much a design failure as a structural one.

CAMP USA Express Runner: Lightest Weight Pick

Weight is a constant consideration in mobile dwellings, and the CAMP USA Express Runner is the lightest option on the market for structural rigging. By utilizing ultra-light materials, these runners prevent unnecessary weight at the ceiling, which is vital when working with delicate van roofs or lightweight joist systems.

While light, they do not skimp on safety; the stitching is wide and reinforced, providing a secure connection that withstands significant tension. The material is also supple, allowing for easy adjustments when tensioning the net during the final stages of the build.

This is the clear choice for vehicle-based builds where every pound counts toward fuel efficiency and payload limits. If the loft needs to be lightweight and portable, the Express Runner is the undisputed winner.

Edelrid Tech Web Sling: Best Hybrid Sling

The Edelrid Tech Web sling represents a unique middle ground, featuring a polyester sheath that protects a high-strength inner core. This hybrid construction offers the best of both worlds: the extreme strength of Dyneema with the protective, easy-handling surface of traditional nylon.

This design is particularly advantageous if the slings are routed through sharp metal hardware or tight corners. The protective sheath prevents the high-strength core from suffering the internal friction or heat buildup that can degrade thinner, exposed slings over time.

For complex installations involving unusual angles or contact with abrasive surfaces, the Tech Web is the best defense. It offers a level of durability and versatility that standard runners simply cannot match in challenging environments.

Understanding Sling Strength and Safety Margins

When calculating the strength of a loft, never look at the breaking strength of a single sling as the limit for the entire project. Climbing slings are typically rated in kilonewtons (kN), where one kN is roughly equivalent to 225 pounds of force.

Always design for a significant safety factor, typically aiming for a system that can handle at least five times the maximum expected static load. Remember that dynamic loads—such as someone jumping into the net—exert significantly more force than a stationary person.

Distribute the load across as many anchor points as possible. A loft with twenty attachment points is exponentially safer than one with four, even if the individual slings are weaker.

Dyneema vs. Nylon: Which Sling to Choose?

Nylon is the classic choice; it is supple, easy to handle, and has a slight elasticity that makes it better at absorbing shock. However, nylon is susceptible to moisture absorption and loses some strength when wet, which may be a concern in high-humidity environments like a van or a boat.

Dyneema (often branded as Dynex or Spectra) is incredibly strong, lightweight, and almost entirely hydrophobic. It is the preferred material for high-tension systems where stretch is undesirable, though it can be more prone to melting under high friction.

The decision often comes down to the application: use nylon for high-impact or shock-prone areas, and Dyneema for structural tension and weight-sensitive installations. Both are perfectly safe when used within their manufacturer-rated parameters.

How to Calculate Your Loft’s Sling Needs

To determine how many slings are needed, map out the perimeter of your loft area and establish an anchor point every 12 to 18 inches. This density ensures that if one anchor fails, the load is safely transferred to the neighboring points rather than causing a catastrophic system failure.

Always account for the length of the sling needed to reach from the mounting hardware to the netting. It is better to use a slightly longer sling that can be tied or adjusted than a sling that is too short to reach the anchor comfortably.

Include a 20 percent buffer in the total sling count for adjustment needs or potential future modifications. Having extra material on hand during the build prevents the frustration of being forced to compromise on safety because a component is missing.

Inspecting Your Net Loft for Long-Term Safety

Safety does not end when the construction is finished; it requires ongoing vigilance. Conduct a visual inspection of all slings at least every six months, specifically checking for signs of fraying, discoloration, or hardening, which can indicate UV damage.

Check the tension of the net regularly, as materials can stretch or settle over time. If a sling feels loose, re-tighten or adjust the anchor connection to maintain proper geometry and load distribution.

If any sling shows physical damage or significant abrasion, replace it immediately rather than attempting a repair. A structural loft is only as strong as its weakest component, and replacing a ten-dollar sling is a small price to pay for long-term safety and peace of mind.

Building a net loft is a brilliant way to expand your usable floor area, provided the installation is handled with precision and quality components. By selecting the right sling for your specific configuration and maintaining it with care, you create a space that is as reliable as it is comfortable. Always prioritize structural redundancy, keep your inspection schedule consistent, and enjoy the extra room that intelligent design provides.