A soft carrier or sling is great to have to get through the airport and to keep baby close for
naps, but you both will overheat if you use it for any length of
time during the mid-day heat, even if you're out of the
sun.
I pull the black - out curtains shut
during the afternoon to block out a lot of the daylight for
nap time, and in the morning, as the
sun is coming up, they're a lifesaver for blocking most of that bright morning light that would otherwise wake her up like a rooster at 5 am.