The most space-efficient approach is layering around a middle temperature range rather than packing entirely separate wardrobes for each climate — a base layer, a mid layer and one packable outer layer covers a wider temperature range together than the same volume spent on climate-specific single-purpose items.
Compression packing cubes matter more on a multi-climate trip than a single-climate one, since the total volume of clothing needed is inherently higher — genuine second-zip compression is what keeps that larger wardrobe fitting into the same case.
Packing the layers needed soonest — typically the warmer climate at the start of a trip — nearer the top of the case, with items for later legs packed deeper, avoids needing to fully unpack and repack at each transition point during the trip itself.
Check with your airline and read the label before you follow anything here. Lithium battery watt-hour limits, liquids allowances and lock policies differ by carrier and by country, and change over time — the figures published by the airline or security authority you are actually traveling with take precedence over anything written on this site. A power bank or spare battery is carried exactly as its manufacturer and your airline specify, never estimated. We report what is published — a watt-hour rating, a size limit, a lock's official recognition — and this site describes the equipment only: nothing here is a guarantee about what a specific checkpoint will allow on a specific day.
Last reviewed 26 August 2026