British & Australian to wear new shoes for short periods of time until they become comfortable
Make sure you wear in your walking boots properly before the trip.
phrasewear in wear in sth • wear sth in to wear new boots or shoes for short periods of time until they become more comfortable: I'm not going on any long walks till I've worn in my new boots.
wear in
To cause an article of clothing to stretch and become more comfortable through continuous use. I know the shoes are stiff right now, but once you wear them in a bit they'll feel much better.I hate wearing suits that haven't been worn in.
wear in
v.
To loosen or soften some new clothing by wearing it: That sweater will feel better after you wear it in.