About Us and why we do what we do:

Your body isn't the problem. Your schedule is.

Over 20% of the global workforce works outside standard daytime hours. Yet almost all sleep research, products, and advice has been developed for one type of sleeper — the person who goes to bed when it gets dark. That's the gap Malden Limited was founded to close.

Daytime sleep is physiologically demanding — not a matter of willpower

The human body runs on a biological clock — the circadian rhythm — governed by light and dark. Cortisol rises naturally in the morning, core body temperature peaks in the afternoon, and melatonin production only begins once it gets dark. Sleeping against this rhythm isn't simply a question of discipline; it is a struggle against fundamental biology. Research from the National Institute of Environmental Health Sciences shows that shift workers have consistently shorter sleep duration, poorer sleep quality, and higher rates of metabolic disruption compared to day workers.

"Shift workers exist in a state of chronic circadian phase misalignment — the body is attempting to sleep at the wrong point in its own internal programme."

— Journal of Sleep Research, 2019

Malden Limited

is introduced in the hero as the company with a clear founding purpose, woven into the "what we built" section as the entity behind the system, and anchored by a dedicated mission statement box that spells out the core ambition — better sleep quality, accessible to as many night workers as possible.

The mission box sits deliberately between the stats and the science, so it reads as a commitment backed by evidence rather than a marketing tagline.

The Day Sleep System — a signal-based framework

At Malden Limited, we didn't start with available products. We started with sleep physiology and asked: which external signals actually prevent sleep in daylight conditions, and what does it take to change them? The answer was a system, not a single product. Three factors — light, sound, and breathing — were identified as the primary exogenous sleep regulation parameters. The Day Sleep System addresses all three, designed specifically around the circadian challenge of daytime sleep. Our goal is straightforward: make the kind of sleep quality that night workers deserve as accessible and achievable as possible.

Scientific basis

  • Åkerstedt, T. (2003). Shift work and disturbed sleep/wakefulness. Occupational Medicine, 53(2), 89–94.
  • Boivin, D.B. & Boudreau, P. (2014). Impacts of shift work on sleep and circadian rhythms. Pathologie Biologie, 62(5), 292–301.
  • Chellappa, S.L. et al. (2011). Non-visual effects of light on melatonin, alertness and cognitive performance. Behavioural Brain Research, 217(1), 23–30.
  • National Institute for Occupational Safety and Health (NIOSH). Shift Work and Long Work Hours. CDC, 2020.