What I'm going to say is not at all against your girlfriend, but I find amazing that you could buy pantyhoses for 1$ that are single use. The amount of waste must be staggering.
I was surprised as well. Stores sell 1 packs for $1.50, or 2 packs for $2 at list price.
I never really put much thought into pantyhose during my life, and I just assumed they costed $10 and lasted a long time like a pair of socks. I didn't realize 1-2 wears is normal. It is a huge amount of waste as you said.
Nonetheless, I don't think $150 pantyhose is the solution. My girlfriend can have three different thicknesses to choose from in her closet for $3. She's not going to pay $450 to have that same level of selection. I think the price needs to come way down from $150 to $25 to make sense.
Great conversation here. Unless you're going to a Costco, I'd say you'd be pretty hard pressed to find $1 pairs of pantyhose in the US or Canada (which is I'll admit where I have the most market familiarity). And even if you could get a "disposable" pair for $1, the problem generally is that you don't know when during that first where they might rip. Having your tights get a run mid day is a major inconvenience. It is why a lot of women say they no longer wear pantyhose. Not to mention the waste of the single wear product (which takes about 50 years to decompose in a landfill). I don't think everyone is going to immediately start investing in indestructible pantyhose, but I think there are very clear benefits for those that do.