Pack a pocket sized kit and learn three optics safe methods, wipes, spray and microfiber, or soap and water, to keep sunglasses streak free while traveling.
Choose metal or acetate for travel. Learn when foldable metal packs best, when acetate wins on colour, and what to check for fit, allergy risk, and UV.
Check for UV400 or 99–100% blocking, learn why polarization isn't UV protection, and use a four-step buying checklist so foldable sunglasses still protect.