Summer bedding: how to build the bed

Layer 1: the fitted sheet and what is under it

Start at the mattress. If you have a foam mattress or a foam topper, a thin fiber pad between you and it changes the surface without adding a slab — see cooling mattress pads. If you have a waterproof protector on for no particular reason, take it off for the summer; a membrane you do not need is vapor resistance you did not have to accept.

The fitted sheet itself: percale, linen or lyocell. Check the pocket depth against your actual mattress height including any topper, because a fitted sheet that pops off at 4am undoes everything else.

Layer 2: the flat sheet, which is the layer that matters

A flat sheet is the one thing between you and the room for most of a summer night, and plenty of people have stopped using them. Put one back on. It is the layer you can pull up or push down without waking properly, and in an open weave it is genuinely enough covering for a hot night.

Same fabric rules as the fitted sheet: an open weave if you wake hot and dry, an absorbent fiber if you wake damp. Our sheets roundup covers the choice.

Layer 3: a waffle blanket, and nothing above it

This is the summer top layer. A cotton waffle blanket holds most of its own thickness as air, sits off your skin, absorbs sweat, and costs about $30. Used alone it is enough for a warm night and light enough that you will not throw it off.

The comforter goes in a bag in a cupboard until October. This is the single most effective change on the page and it costs nothing.

The pillow, which people forget

Your head produces the most heat per square inch of anywhere in the bed, and a winter pillow is as wrong in July as a winter comforter. A viscose or lyocell case is under $20 and it is the highest-value change available. If the fill itself has warmed through by 2am, that is a structural problem — see cooling pillows.

Two habits worth adopting

Strip the bed in the morning. Pull the covers back rather than making it immediately. Moisture that went into the mattress and pillow overnight needs somewhere to go, and a made bed traps it. It takes two seconds and it matters more in summer than at any other time.

Own two sets of everything. A damp sheet does not behave like the fabric you paid for. Being able to start every night on a genuinely dry set does more than upgrading from a good fabric to a slightly better one.

The room still comes first

None of this works in a 78°F bedroom, because every layer above depends on the room being somewhere cooler for heat to go. Read how to stay cool at night before spending anything — most of what is on that page is free.