i will answer your question when you make one that actually makes sense when read.
Spandex is the same as stretch pants, unless the material is nylon or silk.
sweat pants, stretch pants, jeans, overalls, track pants
Hot pants were abbreviated shorts of sorts- designed for women by the Fashion designer Mary Quant, somebody else answered. Allegheny refers to the Pittsburgh area mountain range- and also the now-defunct airline by that name. There was once a song, Allegheny Moon. It is conceivable Allegheny Hot Pants were a style of Hot Pants in the colors of the Allegheny airline, or perhaps popular in Pittsburgh area. As the Line is long out of business, there is no way to verify this . Maybe something like what the British call ( tropical kit) for commisary personnel.
It would be easier to answer, to know what type of stretch pants one has in mind. Yoga pants, running pants and regular women's elastic waist pants could be considered stretch pants. Yoga and workout pants are available in all levels of quality and price points, at places like Big 5 sporting goods, REI, Sport Chalet, even KMart or Target. The elastic waist type of stretch pants would be available at a store like Walmart.
I have seen White Stag Stretch Knit Pants at Walmart If you can't find white stag pants anymore. stretch pants are just as good as the White Stag brand. I just purchased 2 pants and 2 Capri's, because I could not find the sizes at Walmart anymore.
Khols department store does not sell Osso pants. The pants can be found at other retailers and are shiny often bright colored stretch pants. They are used as casual pants.
It is known she invented what are called Hot Pants. a variation in PA was termed Allegheny Hot Pants and these were adopted by cabin staff of the now defunct Allegheny Airlines. I do not know if she is from the Pittsburgh area.
Linen Club pants are the most fitting work-from-home linen pants according to the budget that you can stretch.
well... you could just put them on and stretch them
BendOver pants are a comfortable blend of smooth stretch woven fabrics that move with the person wearing them. Because of the material, these pants are durable and designed to protect against embarrassing rips.
Pants don't actually grow...they may stretch or shrink. It is more likely that you have lost weight.
As far as I can tell, there is little to no difference in yoga pants and regular aerobic pants. Both need to have four way stretch so they do not ride up or down during movement.The material needs to breath so the sweat is easily dispersed.