Sent with USPS it took 2½ months.
→ One has to be patient these days ...
A nearly empty 787 must have been a bit eerie indeed.
Nevertheless this plane is one of the few running that provide higher oxygen level, higher air pressure (~2000m)
& does not use bleed air from the engines, but fresh air via two separate inlets upfront directly,
for the air conditioning system of the cabin.
Cheerio !