Buy once, replace (just about) never

Probably only the people with true, all dyneema/spectra packs could say this. When i say dyneema, i don't mean the nylons that have dyneema reinforcing threads in it, i'm talking packs made out of pure spectra/dyneema/UHMW-PE yarns/fibers. Those packs will likely outlast the people who use them and probably outlast even their children.

cookware I have had one titanium mug for 2 decades. A good compass Svea 123

Derr, and yes, like Ken indicated, many titanium products.

Nylon dress socks. Some of them will last 30 years. They are all I wear when backpacking.

"They are all I wear when backpacking." I'm sure we're all quite open minded here, but don't you get cold?

My McHale pack.

As long as you don't lash them tight to a pack with cord (which cuts into them) the Ridgerest will last forever. Never goes flat either.

"cookware" +1. And it doesn't even need to be titanium. Unfortunately I don't have a Svea 123.

Generally the lightest gear is the most expensive and lasts the least amount of time. Some kinda inverse of Moore's Law involved here? billy

My Opinel 3" knife At 1 oz it may not be all that UL for some.

Yeah I was going to say, I have a Osprey pack from when they had a "Pro" line (high denier cordura as far as the eye can see). I will never claim it at lightweight but it has been to heck and back (even got thrown off a horse once) and barely has a scratch after more than 15 years. I keep telling myself I'll buy a lighter pack when it wears out, but I don't think that will actually happen. honestly it's a pretty good money saver that way!

Bearikade canister. good thing too, because they're friggin' expensive.

Ralph, Good one.

OR Crocodile gaiters

A good knife. – Many to choose from I also have my first polyester baselayer top & bottom. They are still awesome. Granted, they've no doubt lasted because I have rarely worn them outside camp, but still. I wear short sleeves or a long sleeve Columbia fishing shirt most of the time when hiking.

For me it's a good down sleeping bag. I bought my first high quality down bag in 1980 and paid $300 for a -10F rated North Face Ibex mummy bag which lasted 21 years and thousands of bag nights. I replaced it with a WM Puma rated at -15F and I expect the same 20 year life span which for a piece of backpacking gear is remarkable.

Not really ultralight backpacking related, but quality firearms and steel tools will last generations.

"Ralph, Good one." +1

I've had my Mountainsmith Day Pack since 1994. My Frostfire II from the same era just started its second life with a buddy's brother-in-law. http://engearment.com/gear/mountainsmith-day-pack/

Montbell Tachyon wind shirt. Super thin, ultra light, but indestructible. People always seem worried about ultra thin fabrics (me too), but this ballistic nylon I've worn for hundreds of times, friends have crashed bikes, but no rips.

I' have a couple Dam McHale backpacks that will last longer then me.

#ERROR!

Larry DLB, I have a SVEA 123. It was my 1st stove and still works great. I can't bear to sell it or its companion SIGG Tourist cook kit. Oh, yeah, my wife has lasted through 47 years of marriage (and undeclared war) with ME! She's "durable". ;o)

Bought my WM versalite in 2004, it's seen perhaps 35 trips now. Still looks brand freaken new. I recently switched to a zpacks for the weight savings, but I still miss my versalite.