“If it allows the body to stay cool instead of overheating, yes, it does work - having a cool core body temperature is critical for melatonin production, our key sleepiness hormone to help us fall and stay asleep ” she told Sleep expert Olivia Arezzolo said she believes cooling mattress toppers do work and is her recommendation for hot sleepers. “It absorbs and stores excess body heat when we’re too hot, and then releases it back to us when we become cold,” Ms Gavin said. The second type is temperature regulating technology, commonly found in heat absorbing and releasing microbeads. One type works the same as moisture wicking technology in activewear where the moisture from your sweat is absorbed away from the body. The second option is cooling fabric technologies which can work in one of two ways.

“Unlike other fibres, wool is an active fibre that reacts to changes in the body temperature,” Mrs Gavin said. One option is a wool mattress topper - it has natural breathability properties that work all year round, keeping you cool in the summer and warm in the winter. That way, you’ll get a comfortable sleep and not waking up in the middle of the night from overheating.Ĭooling mattress toppers can work in two different ways, according to homewares senior buyer at Myer, Jess Gavin. But in the dark November woods it’s striking how many shades and hues are visible, the forest floor kaleidoscopic with dark oak leaves and light beech leaves and maple leaves brighter still.This mattress topper uses a combination of both wool (which offers natural breathability) and cotton (which works to naturally cool). Night vision is largely achromatic-we barely see color, if at all. The world is rendered purely in grayscale. In the woods now, I lose the horizon, the distant lights of houses, the stars overhead. Even a brief blast of light from a headlamp will trash rhodopsin and set my visual dark adaptation back to zero. From this gate to the creek-bottom ladder stand, I’m in the woods, following a farm path through a mosaic of big oaks and dark pines. Look away from the moon and the lights of distant houses. Instead, we have to hoard and protect our rhodopsin like a thirsty traveler rations water. Humans aren’t equipped with a tapetum lucidum-an extra layer of reflective cells behind the retina that reflects incoming light back through the eye for a double dose of low-light absorption.

Light bleaches out the rhodopsin, which then takes about a half-hour to fully recharge. “visual purple,” that supports low-light vision. Scattered along the retina are light-gathering rod cells, which produce a protein called rhodopsin, a.k.a. The longer I go without a light, the better I’ll see in the dark. Unlatching the gate without a light is tricky, but I also want to give my eyes the chance to catch up. At the bottom of the field, I take a break.

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