: Often non-padded and wire-free to prioritize comfort for long-term wear.
: If linked to the DESI project, this could be a reference to a specific data processing piece (a "piece" of code or observation set) from October 2023 involving an "X-Prime" focal plane or imaging software version. desi 2 xprime 20231423 min top
"A Spectroscopic Road Map for Cosmic Frontier: DESI, DESI-II, Stage-5" : Often non-padded and wire-free to prioritize comfort