They are as long as you get actual Egyptian Cotton. The best way to tell if the cotton is really 'Egyptian Cotton' is the pricetag ;) Primo brands like Sferra, Frette, Pratesi, etc. will usually use true Egyptian Cotton in their products, but again, you have to pay for it. There are different grades of Egyptian Cotton as well, and what you really want is extra-long staple one-ply Egyptian Cotton since that is usually the best quality. Giza Cotton is the highest grade of Egyptian Cotton you can get and usually for a 'good' set you'll have to pay at least $1000 for it. Anything less than that is not true Giza Cotton (or it's a shittier version of it and not good quality). If you want really good Egyptian Cotton sheets you'll more than likely be spending at least $500 for a King set, to start. Anything less than that would be considered 'mid-tier' and is, as it is so-named, mid-tier and not anything spectacular. Don't get me wrong, mid-tier is not bad and can be pretty good sheets for the price, but there's something to be said for using high-quality Egyptian Cotton sheets that are crafted by master craftsmen (usually that is sheets made in Italy or Portugal). That's why the best sheet sets you can get are ones that are made in Italy (the best), or Portugal (a close second, but still not as good); US-woven brands sadly don't compare and the loss of the manufacturing base in the US has meant that the art of linens have been mostly lost to time thanks to outsourcing. Italy and Portugal, on the other hand, haven't had that issue and still retain their centuries-long mastery of the craft and it definitely shows. If you get an opportunity to feel some swatches from brands like Sferra or Frette then their Giza Cotton offerings are definitely not to be overlooked (it's absolutely wonderful, especially the sateen offerings). I had the pleasure of feeling Sferra's entire line at my local specialty linen shop via its swatches and I gotta say... their Giza Cotton swatch (and the Milos line, too) were buttery-soft and I can't unfeel them now :( But, from my experience, yes: they're worth it. But you'll be crying buckets of tears from buying really good quality ones since they're so damn expensive. I had to compromise and get Peacock Alley's Soprano sheets since they were the cheapest 'primo' brand/model I could get for the price with decent quality extra-long staple Egyptian Cotton (made in Portugal). I adore them and don't regret it, but if I could have, I'd have gotten Sferra's Giza 45 sateen weave sheets :( Answer from SorcererLeotard on reddit.com