Aldi sells very good and very bad stuff.µI should have taken a pair of overshoes back I bought a few years ago - zip bust almost immediately. These days I try to look through my old receipts and highlight anything that is not food - chuck in a bag.
Should say that I bought a different design of zipped overshoe from them a couple of years later and they have been fine - generally decent quality.
I seem to recall that some of their electric/electronic stuff comes with a three year guarantee, which is excellent.
i find their merino baselayers very good - can the stuff you see on sale elsewhere for £50 or so really be that much better?
All shops do.
I've things that last 15 years, and things that came already defective, or shortly became after using.
It's a matter of thorough inspection in the shop.
Crap has some indicators.
Push/pull/bend parts. See what and how it happens. Ex 3 weeks ago a dog bath, circumference some stiff material under plastic. I pushed on it and felt it splintering - so hard brittle fragile. The bath would soon have become a bag.
Hold it up against the lighting. A raincoat that is a see through maze isn't a raincoat.
Some raincoats (adidas seen alot) have some white coating on the inside, which is the water resistence.
But it's not plastic, it's like sprayed paint, and it just falls/wears off into very fine dust that gets everywhere on you and your other things.
Raincoats with "sealed seams", but they used a glue that apparently isn't water resistant, causing all the tapes to disattach and the water to get through.
Scratch the surface with a nail. If it easily peels off, it's polyurethane, read: biggest crap out there.
Feel the weight.
Almost everything that is "coated", is rubbish. Non massive polyurethane, pvc, ...
I've seen heavy leather looking motorpacks, peeled off (PU) over their entire surface, with the weight due to some filler.
100% acryl clothes easily detach fibers and soon start to look like something exploded inside them.
Cotton wears fast especially when wet.
The (original) price says alot, but I have seen alot expensive stuff with a single flaw that ended their usability.
You mention zippers, some are indeed, kinda extruded aluminium, even worser than Magura's brake handles.
I've had zipper lids that despite tiny that I could break with my thick fingers with no effort at all.
A second hand sports t shirt, about 100 euro in a luxe bicycle shop, no fake, label 100% polyester but its zipper was sewed with cotton thread, that broke and was revealed by that.
If I wanted to put any focus, I'd say: polyurethane / everything coated. Rubbish.
Another raincoat example: polyurethane sold under the branded name "Flexothane".
It's a coating, and apparently it isn't uv resistent - misses some additives, it gets full of little cracks,
Fun thing is: they know, and sell "repair stickers" for it. Extremely expensive for what they are.
And useless, since cracks continue to appear, and if you would keep on repairing stubbornly, you would end with a totally sticker covered coat that costed a 100 times the price of a new coat. It's haha, but real.