Heavy, strong, AND stretchy!

The best webbing for bounce training and stability.

Dynamic Weave Profile
Feather Soft ...
LineSkin Resin Coating
No Twist edge colors

Quick Specs:

Stretch8.87% @ 6kN
MaterialNylon (PAD)
Weight100 g/m (6.72 lbs/100 ft)
MBS45.0 kN (10,116 lbf)
WLL15.0 kN (3,372 lbf)



Best Tension

2.0 - 6.0kN


Introducing the all new "Heavy", a powerful, high weight, nylon webbing with bounce like no other line out there.

This 100 grams per meter beast that is called Heavy is a monster of a webbing. Sporting a 45 kN MBS and a thickness of 5mm, this stuff is absolutely incredible. Don't let the big weight fool you though, Heavy still packs quite the bounce. With a stretch of 8.87% at 6 kN (13.12% at 10 kN), you can get some serious flex on this webbing!

Available in 50m, 60m, 100m, and 120m lengths with sewn loops on both ends, or as a custom length by the meter without sewn loops included.

Made in the US

As Burly As It Gets!

45 kN of Pure Nylon with a Robust LineSkin Coating

Heavy is an incredibly burly slackline webbing. This beast of a line packs a huge 45 kN MBS, is made from 100% nylon, which adds significant load dampening through it's high stretch, AND has our signature LineSkin resin coating, giving even more abrasion resistance and longevity! We have never had such a powerful, robust, and strong webbing in our shop prior to this.

Heavy webbing, super robust!

If you are looking for webbing that can withstand just about anything you throw at it, this is your line. Great for high tension lines, heavy training lines, or even freestyle training lines!

Heavy AND Stretchy

Get the maximum momentum in your bounce!

Typically, a webbing with as much mass as Heavy comes with very little stretch. That's due to the sheer amount of material that is in the weave. However, through some clever weaving trickery and use of the highest elasticity fibers we could get our hands on, Heavy packs a very high stretch, matching and even beating some of our other nylon webbings.

Heavy Stretch Curve

With that in mind, that makes Heavy usable and actually quite fanastic for freestyle rigs. Use the added mass to gain more momentum in your bounce and to have more force in the uplift. Our favorite way to rig Heavy is side-by-side with a standard freestyle rig and swap back and forth between the lines. The added weight from the Heavy will train your muscles much faster and make the normal freestyle rig feel like

Compare the stretch of Heavy to our other webbings on our Webbing Stretch page

Anti-Twist Color-Scheme

Nice usage of black yarns to give easy identification of twists

Heavy uses a dying process to get the blue color. Because of this, we are limited in what colors we can add as secondary to the dyed webbing. Black is a color that can withstand the dying process without changing colors. Because of that, we can use it in the weave regardless of what color we decide to make the end product. That allows us to put stripes of color wherever we want, which is helpful in providing sided-ness for a solid-color webbing.

Heavy color scheme

Heavy uses two thick, black lines on each edge of one face. This gives a large and obvious visual contrast to the blue, which is easy to spot over long distances.

Tech Specs


Heavy Dimensions

Width – 25.4 mm (1.00 inches)

Thickness – 5.00 mm (0.197 inches)

Weight – 100 g/m (6.72 lbs/100 ft)


MBS – 45.0 kN (10,116 lbf)

WLL – 15.0 kN (3,372 lbf)

Abrasion Retention – 0.6

Webbing Anchors

AWL4 Mean Strength – 46.0 kN (10,340 lbf)

AWL4 MBS – 42.2 kN (9,486 lbf)

AWL5 Mean Strength – 39.4 kN (8,857 lbf)

AWL5 MBS – 37.0 kN (8,317 lbf)

AWL6 Mean Strength – 41.6 kN (9,351 lbf)

AWL6 MBS – 39.0 kN (8,767 lbf)

MightyLock Mean Strength – Not compatible

Webbing Grips

LineGrip Slippage – No slippage up to 150% of WLL (22 kN)

Wafer XL Slippage – No slippage up to 150% of WLL (15 kN)

Wafer Slippage – No slippage up to 150% of WLL (6 kN)

Sewn Loop

Mean Strength – 36.9 kN (8,295 lbf)

MBS – 33.9 kN (7,620 lbf)

Thread Type – 208-lb Bonded Polyester


Raw Materials – 100% Nylon

Weave Structure – Flat Weave

Weave Zoning – Single Zone Construction with high density weave and LineSkin Resin Coating


Style – Heavy, strong, AND Stretchy!

Optimum Tensions – 2.0 - 6.0 kN (450 - 1,350 lbf)

Preferred Lengths – 50 - 300m (165 - 1,000 feet)


Approved – Yes

Backup Length – How long should the backup be with a Heavy mainline?

  • 50m main - 54m backup
  • 60m main - 64.8m backup
  • 100m main - 108m backup
  • 120m main - 129.6m backup
  • Other lengths - Backup 8% longer than main


1 kN – 1.08%

2 kN – 2.24%

3 kN – 3.37%

4 kN – 5.24%

5 kN – 7.18%

6 kN – 8.87%

7 kN – 10.19%

8 kN – 10.87%

9 kN – 11.99%

10 kN – 13.12%

11 kN – 13.68%

12 kN – 14.24%

Heavy stretch
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