When it's boiling hot the last thing you want is for your shoes to rub and I find sandals can be terrible for this so I often reach for white trainers instead. They might not scream summer in the same way but they're a versatile footwear option that can easily be worn with seasonal outfits.
The Princess of Wales's favourite pair are her Superga Cotu classics and she's styled them multiple times with shorts. Perhaps the chicest way we've seen her wear them was with her white linen-blend shorts for a visit to Plymouth in 2022.