Is It Okay to Wear Beanie Hats After Otoplasty (Ear Pinning)?

I had the procedure a few weeks back and am past the stage of wearing a headband 24/7 (only at night). My surgeon said I could wear a headband/hat alternatively (since they both serve to hold the ears down), but I wore the headband 95% of the time because a hat was too warm for long periods (UK summer here, though fairly cool). My ears are still rather bruised/swollen, so I like to wear a hat over my ears when I go on walks for an hour or so in the evening. Is this okay despite the extra heat?