Loewe mini puzzle in off white pebbled leather. Can be smushed into a suitcase and overstuffed for a day trip ( I dont carry much, but it fits a lot for its size). Lightweight And can transition from a winter white to a fresh pop summer neutral in the blink of an eye. Take off the crossbody strap, and you have a cute bag for cocktails or dinner.
for airplane travel, I like an hermes navy felt TPM Evelyne. No one makes a fuss if it’s crossbody while im seated for take off. It’s easy and understated, and furniture quality felt is arguably as durable as leather. Also nice for ski vacations. DH loves the Hermes sac a de peches 21 for travel. Crossbody only, but fits a lot in a slim profile.
For pool and beach, I used to use a Goyard St. Louis bc it collapses completely flat in my weekender bag, but honestly, if you carry water or sunscreen, it’s safer and easier to use an inexpensive hotel tote.
ETA: I would not be able to go to a smaller bag without the valextra universal sunglass case (exposed temples). It fits even oversized sunnies.