Most consumers are brand-biased and skip on fabric chemistry. That is wrong. The material selection and how it is made matter the most. Consider bamboo viscose, eucalyptus tencel, Egyptian cotton casings, phase change materials.
!Macro textile photo comparing weave density and fiber texture of bamboo viscose, eucalyptus lyocell, and cotton shells.
If you sweat more than if you overheat, prioritize moisture-wicking fabrics and read this section with too hot under comforter home remedies. If you struggle with loss of loft, read comforter clumping diagnosis and washing protocol. For advice on what to buy, skip to best overall and summer-specific picks.
!Some kind of a cross sectional view of comforter shell and fill environments - moisture zones and thermal zones indicated with arrows.
The larger sustainability tradeoff can be found in natural vs synthetic bedding and sustainable cooling bedding.