Best black leggings . . . ?

[ZiggyForever]

Right, it's autumn, I need some black leggings! I want them to wash well (in terms of colour fastness and durability of material), not bag or sag at the knees or bum throughout the day, and ideally would have some magical buttock-lifting properties

No real budget in mind - happy to invest in a couple of pairs of decent ones. Recommendations/ones to avoid, please . . . ?

They have regular and long im in Sainsbury's now

Just bought a pair of Gap black gym leggings. High rise, not see-through, supportive. £20 in the sale.

Picked up a pair on matalan yesterday, wore them today and they are remarkably comfortable. I'm hoping they wash well.

I'm not understanding the Sainsbury's luxury leggings love at all! The waistband is really flimsy and they go a bit saggy - far from luxury
I like Boden and Asos - quality is good, thick, don't fall down, don't go baggy, wash well, keep their black colour. What's not to love?!

Primark £3

After years of having leggings that rolled down under my belly or went baggy at the knees, these ones from funky simplicity are the best, they are a bit pricey but well worth it, mine are never off me www.funkysimplicity.com/collections/leggings-flares-yoga-pants/products/perfect-black-leggings-plain-yoga-tights