It's not a matter of wearing them all the time. It makes it much faster to save all appropriate HUDS that go with the attachments with your outfits ... then you choose the colour you want and/or click the appliers you want for that outfit then TAKE THEM OFF because otherwise you can't see through the HUDS anyway. 38 is severely inadequate for anyone who wears a mesh head and body together with hair HUDS, nail HUDS, tattoo HUDS, lipstick HUDS, mesh eye HUDS, shoe HUDS, applier relays and so on and so on. I'm constantly hitting the 38 and it's really irritating and time-consuming. 38 was fine when everyone wore system layers and hair that didn't come with a HUD but not now. I think 50 is more adequate to our current needs.