From what I have read, the virus doesn't survive long on fabric/wool, so it should be perfectly safe. If you wrap up and keep for a few days before sending, it would add extra safety.
There's a very interesting article about how Covid actually spreads, with excellent graphics here:
english.elpais.com/society/2020-10-28/a-room-a-bar-and-a-class-how-the-coronavirus-is-spread-through-the-air.html
If you don't want to read it, this is the relevant extract:
..contaminated surfaces (fomites), although the US Centers for Disease Control and Prevention (CDC) indicates that this is the least likely way to catch the virus, a conclusion backed by the European Center for Disease Control and Prevention’s (ECDC) observation that not a single case of fomite-caused Covid-19 has been observed
Although early in the pandemic, it was thought that contaminated items could transmit the infection, current evidence is that this is very unlikely and airborne transmission is the main route.