I mostly buy Staples brand because they are always less expensive and usually very good quality. I was somewhat let down with this envelope. The color is pale and they just don't seem very "extra heavy". They may be heavyweight but they are not extra heavyweight. They work just the same as the more expensive ones but it just wasn't as good as the normal Staples brand items.
I have used this type of of envelopes for many of my filing mailing and easy folder to track work receipts and expenses. Really helps in yearly tax preparation as well.
The clasps on Staples envelopes all rust. They also make a mark on every envelope in the box. Three different boxes did the same. Very poor quality clasp that marks the envelope it sits against in the box and quickly rust and mark the envelope fronts even worse. Most other brand's clasps do not rust. They also cut the flaps at an angle now to save money on the cost so the flaps no longer cover the whole area. Previous box had rounded flap covering all the area and was a nicer quality envelope as to appearance.
I FIND THIS ENVELOPE IS PERFECT FOR FOLDING 8 1/2 x 11 PAGES AS IT MEETS THE POST OFFICE REQUIREMENT TO GO AS A LETTER I.E. FITS THROUGH THE 6 1/8 TH INCH TEMPLATE SLOT AND CAN INSERT MORE PAGES SO IT WILL NOT BE OVER A 1/4" THICK. THIS IS A GREAT WAY TO BEAT THE POST OFFICE AND IT'S "INSANE" SYSTEM OF WEIGHTS AND MEASURES.