At very low prices it is difficult to get all things in headphones, and sadly durability is one of the first things that goes at the very low price tiers.
Speaking of that however… Did I mention the ones I talked about previously are 51 dollars right now? I feel like I should have mentioned that earlier…
But back to the main topic, the best headphones I can think of that offer great sound, durability, and the sort of longer lasting experience you are after tend to start over 100 dollars, and even then, there are many pitfalls in that price range where the products are still of low quality.
I know you are interested primarily in open-back headphones, but sadly my focus is only on closed back, so I can only really speak with experience about those.
But don’t despair! There are many folks around here who will likely hop in and have suggestions for you too! 
I will offer 1 more suggestion as an example of what I mean. I recently bought the Meze 99 Noir as a christmas present for a family member, and I have tested them out, and I can report that they are quite good headphones for the price. Good build quality, light, and even though they say they are closed-back, they still have some sound that you can hear, so you are never entirely unaware of what might be going on around you. - The price listed for them is actually quite reasonable for this particular level of headphone at 180 dollars for the wood cup version - these are normally around 200 for the cheap plastic versions and 300 for the wood.
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