It's the overall experience with a pair of jeans, especially nicer ones.
You get them and they're sort of blocky and stiff but over time they become yours- they mold to your body, they wear and change color in some areas, your pockets even adjust to your phone, wallet, pocket knife and such. They soften and become just oh-so familiar to you and your life. You know this. It's nothing new. The fact that denim is so durable AND so comfotable makes it a years-long experience to wear in and finally destroy a pair of jeans and I for one am bummed when I finally have a knee breach that destroys itself via a toe stirrup rip whilst putting them on. It's like I killed a service animal or lost a friend or something. It'll literally take months or even years to get that level of go-to familiarity and comfort back hahaha
A pair of jeans isn't just a pair of jeans, it's an extension of yourself. Somehow I think of jeans as being a higher eschelon than most other clothes. No idea why, they're just superior despite their technological impracticality- maybe it's their classic appeal or their durability or that perfect fit but thank the lawd that denim isn't going anywhere. However- If you wear denim skiing, you really do deserve to be cold and wet, and have your balls so cold your jizz is frozen into a slushie as you're just being an idiot slave to fashion and that's what you get.