Every spring the same thing happens: the weather turns before your bedroom does, and you spend three weeks sleeping worse than you need to before finally admitting the winter setup has to go. This is the fifteen-minute version of that admission, done properly and ahead of time instead of at 1am mid-heatwave.
Why a seasonal reset is worth doing deliberately
Most people update one thing at a time, reactively — swap the doona when it's unbearable, notice the pyjamas are wrong a fortnight later, forget the pillowcase entirely because it doesn't announce itself the way a hot doona does. Doing it as one pass means every layer touching you overnight is matched to the same season, instead of half winter and half summer at the same time, which is the actual cause of a lot of "why can't I get comfortable" nights.
The checklist
Doona weight. If you're reaching for a lighter one more nights than not, make the swap properly rather than compromising with the winter one "just in case" — you can always add a throw back on a genuinely cold night.
Pyjama fabric, not just style. Flannelette and brushed cotton are winter-only fibres by design; check what you're actually wearing rather than assuming "lightweight" pyjamas you bought years ago still are.
Pillowcase and sheet fibre. These get forgotten every season because they don't feel hot the way a doona does, but a synthetic-blend sheet under a good pyjama set undoes half the benefit.
Wash schedule. Warmer nights mean more sweat, which means the wash frequency that worked in winter is now too infrequent — see our full breakdown in how often should you wash your pyjamas (and sheets).
Care pouch or travel bag. If warmer weather means more travel, a dedicated pouch keeps sweat-through pyjamas separate from the rest of your bag rather than airing out your whole suitcase.
Where fabric earns its place on the list
Of everything on this checklist, pyjama fabric is the one people update least often, largely because it's the one item that doesn't obviously look wrong for the season the way a doona does. TENCEL™ Modal is designed to work as a genuine year-round base layer rather than a seasonal purchase, which is worth knowing before you buy a separate summer-only set — the Short PJ Set is built to that brief specifically. If you're deciding what to actually retire versus keep, our full comparison of TENCEL™ vs cotton vs bamboo is the more detailed version of this same decision.
The honest bit
You don't need to buy anything new to do this reset — for a lot of people it's simply re-sorting the drawer so the right things are at the front, and discovering the "summer pyjamas" they already own are actually a mid-weight cotton that's fine for spring but won't cut it in February. Do the free version first.
The short version
Treat the seasonal changeover as one pass across doona, pyjamas, sheets and wash routine together, not four separate decisions made weeks apart as the weather forces each one. For the maths on whether it's worth upgrading rather than just re-sorting, see cost per wear.
General information, not medical advice.