Sling and Quickdraw Lifespan by Material and Use
Dyneema retires sooner than nylon at every level of use, and the gap widens the more you climb. An unused nylon sling lasts 10 years against 8 for Dyneema; at weekly use it is 3 years against 1. Ten years from the date of manufacture is the ceiling on any of it, whatever the table says lower down. The fastest wearing textile on most racks is not a sling at all but the dogbone of a quickdraw left hanging on a project, working against rock on one side and a carabiner on the other every time somebody falls on it.
| Use | Nylon | Dyneema |
|---|
| Never used | 10 years | 8 years |
| Rarely, a few times a year | 7 years | 5 years |
| Monthly | 5 years | 3 years |
| Weekly | 3 years | 1 year |
| Daily | 1 year | 1 year |
These are the figures the calculator above uses. Age runs from the date of manufacture, not the date you bought it, and the shorter of the two limits always wins.
Where these numbers come from
The ten year ceiling is the manufacturers' figure. Petzl and Black Diamond both give plastic and textile products a maximum of ten years from the date of manufacture, slings included. The shorter figures for regular use, and the shorter run for Dyneema, are ours. No standard and no manufacturer publishes a table of years by usage frequency, and EN 566, UIAA 104 and UIAA 105 are product test standards that say nothing about age: EN 566 describes a new sling at 22 kN and makes no promise about an old one. So we set a conservative ladder rather than leave the question blank. Read the result as a prompt to inspect the sling, not as a deadline somebody else has certified.
Why Dyneema Retires Sooner Than Nylon
Dyneema is thinner and less forgiving, and that is the whole story for retirement. The same cut takes away a larger share of a thin sling, the fibres are more slippery so a knot in Dyneema weakens it more, and the material stretches very little, so a shock load goes almost straight into the anchor rather than being absorbed. Nylon is bulkier and stretchier, which buys margin in exactly the situations that retire gear. Neither material tolerates a fall taken directly onto the sling with no rope in the system.
Sling and Quickdraw Inspection Checklist
Run this before every session, and again after anything unusual. If a single check fails, the sling is retired. There is no partial pass on load bearing gear.
Webbing wear, cuts and fuzz
Run the whole loop through your fingers and look at it against the light. Surface fuzz is normal. What is not: any cut across the weave, a place where the pattern is broken, a section that has gone visibly thin, or a stiff patch. On a quickdraw, check the rope end loop hardest, because that is where the rope saws back and forth.
Stiffness
A sling that has gone stiff has stopped behaving like webbing. Fresh nylon is supple and drapes over your hand; an old or heavily loaded sling holds its shape and feels board like. That matters beyond comfort, because a stiff sling absorbs less of a sudden load and passes more of it straight through to whatever it is clipped to. Stiffness across a whole sling is age and use; a stiff patch in one place usually means heat or grit ground into the weave. Either way it is a retirement signal rather than something to work loose.
Bar tack stitching
Every sling depends on one block of stitching. Look at both sides of it. Any pulled, cut or missing thread retires the sling, and it cannot be restitched: a resewn sling is not a certified sling. On sewn quickdraws, check the rubber keeper has not been hiding a worn spot underneath it.
Shock loading and falls onto the sling
A fall taken directly onto a sling, with no rope in the system to absorb it, generates forces far beyond normal climbing loads, and Dyneema absorbs almost none of it. If a sling has been shock loaded, retire it, whatever it looks like afterwards. The calculator treats this as an immediate retirement and so should you. To work out whether a given fall qualifies, use the fall factor calculator.
Sun, chemicals and heat glazing
Ultraviolet is the one that gets slings, and it is invisible. Sunlight breaks down both nylon and Dyneema from the outside in, and unlike abrasion it leaves the weave looking intact while the fibres underneath lose strength. The warning sign you do get is colour: a sling whose dye has visibly faded compared with a new one of the same model has had enough sun to matter, and faded is not a cosmetic complaint on a sling.
This is why tat, the accumulated slings left behind on fixed anchors, is so dangerous. A sling that has hung on a rappel station through two summers can look entirely serviceable and have very little left. It is also why an unused sling still carries an age limit at all. Chemicals do the same job faster and with even less to see: acid, solvent and bleach all attack the fibres. Glazing, a shiny hardened patch, means heat, usually from a rope running across the sling under load, and that retires it too.
Never Trust a Found or In Situ Sling
You do not know its history, and not knowing is itself a reason to retire, so treat every sling you find as already retired. Petzl lifetime FAQ lists an item whose full history you do not know as a standalone condition for taking it out of service, alongside a serious fall or load, a failed inspection and any doubt about condition. A sling on a fixed anchor fails that test before you have even looked at it.
Then look at what you cannot check even if you want to. How many summers of sun it has had. Whether a rope has run across it under load. Whether it was shock loaded by somebody who then walked away. Whether it started as a sling at all, or as a piece of accessory cord somebody trimmed. None of that shows up on inspection, and a rappel is the worst possible place to be relying on a guess.
The practical answer is to leave your own material. It costs the price of a sling, it is the one piece of gear on the anchor whose age and history you actually know, and it is what the next party will be glad you did. Back it up while you are testing the anchor, and pull the old tat if you can carry it out.
What Petzl and EN 566 Say About Slings
Ten years from the date of manufacture, and a strength figure that only describes a new sling. Petzl lifetime FAQ sets a maximum lifetime of ten years from manufacture for plastic and textile products, slings included, and states that metal products have no age limit of their own. It recommends a detailed inspection at least every twelve months on top of the check you do before each use, and lists the conditions that end a sling's life sooner: a serious fall or load, failing an inspection, any doubt about condition, an unknown history, and gear made obsolete by changes in standards or technique.
EN 566 is the European standard for slings and requires a minimum strength of 22 kN, a figure the UIAA Standard 104guidance also records as the European requirement for sewn slings. Read what that number is and is not. It is a threshold a new sling has to clear in a laboratory. It says nothing about the sling in your hand after four seasons, and no standard or manufacturer publishes a figure for how much of it is left. Where a standard or a manufacturer does not define a threshold, the judgement is yours, and the rule for load bearing gear is that doubt settles it: if you are unsure, retire it.
Do Slings and Quickdraws Expire?
Yes, and sooner than most of the rack. The calculator sets 10 years from manufacture for an unused nylon sling and 8 for Dyneema, then cuts hard with use, down to 1 year for daily climbing in either material. Textile gear ages whether or not it is used, and the date of manufacture is normally printed on the sewn label. A single shock load retires a sling regardless of age. EN 566 requires a new sewn sling to hold at least 22 kN, but that is a test on a new product and carries no promise about a sling that has spent years in the sun. The sling standards referenced across this site are EN 566, alongside UIAA 104 and UIAA 105.
Retire It Today, No Inspection Needed
Some findings end the discussion. If any of these apply, take the sling out of service now, cut it so nobody puts it back on a rack, and replace it.
- Any cut across the weave, however small.
- Any pulled, cut or missing stitch in the bar tack.
- A fall taken directly onto the sling with no rope in the system.
- A glazed or hardened patch from a rope running over it.
- Contact with acid, solvent or bleach, even if it looks untouched.
- A sling left in place on a fixed anchor for an unknown length of time.
The retirement figures here come from the calculator on this page, and the sling standards referenced across this site are EN 566, UIAA 104 and UIAA 105. Where a standard or a manufacturer does not define a threshold, the judgement is yours, and the rule for load bearing gear is that doubt settles it: if you are unsure, retire it.
Slings sit between the rest of the chain. Check it all: rope, harness, carabiners and helmet.
Frequently asked questions
How long do climbing slings last?
Ten years from the date of manufacture as an absolute ceiling, and far less in use. The calculator on this page works from 10 years unused for nylon and 8 for Dyneema, then 7 and 5 for a few outings a year, 5 and 3 for monthly climbing, 3 and 1 for weekly, and 1 year for either material at daily use. Petzl sets the ten year ceiling for plastic and textile products, counted from manufacture rather than purchase, and the date is printed on the sewn label.
When should I replace quickdraw dogbones?
When the webbing is cut, fuzzed through, stiff or glazed, or when any bar tack thread has pulled, whichever comes first. Dogbones wear faster than plain slings because they work against rock on one side and a carabiner on the other, and a draw left hanging on a project through a season is the fastest wearing textile most climbers own. Check under the rubber keeper as well, which is where a worn spot hides. There is no useful figure in years for a dogbone: inspect it and retire on what you find.
Is a faded sling safe?
Treat it as retired. Fading means ultraviolet has been working on the fibres, and sunlight takes strength out of both nylon and Dyneema from the outside in while leaving the weave looking intact. Colour is the only warning you get, so a sling visibly paler than a new one of the same model has had enough sun to matter. This is why in situ tat on rappel stations is so dangerous: it can look serviceable and have very little left.
When should I retire a climbing sling?
Retire a sling immediately if it has any visible damage (cuts, fraying, discolouration, stiffness, or glazing from heat), after any severe shock load, or when it exceeds the retirement age this checker applies. Nylon: 1 year daily, 3 weekly, 5 monthly, 7 rarely, 10 never used. Dyneema: 2 years shorter at each level, minimum 1 year.
How long do Dyneema slings last?
This checker applies shorter service lives to Dyneema and Spectra slings than to nylon at equivalent usage levels: daily or weekly use, 1 year; monthly use, 3 years; occasional use, 5 years; rarely used, 5 years; never used, 8 years. Dyneema degrades under UV and heat without visible signs, making inspection less reliable than with nylon.
Can I inspect a Dyneema sling the same way as nylon?
Not reliably. Dyneema fibres show less visible fraying before failure than nylon. A Dyneema sling can look pristine while having lost significant strength from UV exposure. This is why this checker applies shorter service lives to Dyneema. In addition to visual inspection, follow age guidelines strictly for Dyneema slings.
What is the difference between a sling and a quickdraw?
A quickdraw consists of two carabiners connected by a short, usually rigid sewn sling (typically 10 to 12cm). A sling is a longer loop of webbing (typically 60cm or 120cm) used for building anchors, extending protection, or threading through natural features. Both use the same webbing materials and follow the same retirement schedule on this page.
Can a nylon sling be used as a belay loop?
No. Slings are not designed to be used as harness belay loops. The belay loop on a harness is a specific load-bearing component tested to UIAA 105 standards as part of the harness system. Using a sling in this role creates a cross-loading or gate alignment risk. Always use a sling in its designed configuration, looped through protection or as an anchor component.
What does "shock loaded" mean for a sling?
A shock load occurs when a sling transitions from slack to taut under a dynamic falling load. Peak forces can be several times the static weight of the load, lasting only milliseconds. A shock load (from a fall where the sling is load-bearing) may internally damage fibres that are not visible from outside. Retire any sling that has held a real fall directly.