What a duvet's tog rating actually measures
A duvet's tog number measures heat trapped, not thickness. Labs heat one side and compare temperatures. A 4.5 tog suits hot weather and 13.5 tog midwinter.
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A duvet's tog number measures heat trapped, not thickness. Labs heat one side and compare temperatures. A 4.5 tog suits hot weather and 13.5 tog midwinter.

Overnight your heart slows, hormones pulse and memories settle. Too little sleep is linked to more hunger, more colds and less clear thinking.

Side sleeping is the most common position and wins on average. Snoring and sleep apnoea favour the side, while back or neck pain often eases on the back.

Most eyelid twitches are harmless muscle spasms linked to short sleep, caffeine, and stress, say the Cleveland Clinic and the National Eye Institute.

MetroNaps pods costing about $13,000 each spread from Google and Silicon Valley to PwC, KPMG and the law firm White & Case.

Science has no single answer to why we dream. Threat rehearsal, emotional repair, memory sorting and creative search each have evidence behind them.