Key Benefits

• Written by a neuroscientist and sleep expert.
• Shows the vital role of sleep in maintaining optimal health.
• Offers practical solutions and strategies to improve your sleep.

Learn more about sleep science with 'Why We Sleep' by Matthew Walker. As a known neuroscientist and sleep expert, Walker explains the mysteries of our nightly sleep, showing its vital role in maintaining optimal health and cognitive function.

Through research and engaging storytelling, Walker explains the impact of sleep on every aspect of our lives. From strengthening our immune system to enhancing memory, each chapter shows the benefits of a good night's sleep.

Moreover, 'Why We Sleep' also offers practical solutions. Walker equips readers with actionable strategies to overcome common sleep challenges and build healthier bedtime routines. Whether you struggle with insomnia or simply aim to maximise your mental clarity, this book serves as a comprehensive guide to unlocking the transformative power of sleep.

This book is under Penguin Books, a British publisher founded in 1935 by Allen Lane, known for making quality literature accessible. By offering affordable paperbacks, Penguin revolutionised the industry, bringing classic and contemporary works to a wider audience. Now part of Penguin Random House, it remains iconic for its colourful, simple covers and its influence on British culture, particularly through its works on politics, the arts, and science.

With our Healf Curation Process, we do the work for you. Shop with confidence knowing that every item has been tried, tested, and curated for you.

Learn more about each step—Brand Discovery, Expert Validation, and Community Testing—here.

Shipping

At Healf, we prioritize safe and fast delivery for all our customers. Our carefully selected couriers are Royal Mail and DPD.

UK standard delivery

Enjoy free standard delivery on orders above £50, this option usually requires 2-3 working days. If your order is under £50, this delivery option is available for £3.99.

Next working day

For when you need our products urgently, we offer next working day shipping for £5.99. For orders placed before 12.00, we will ship it the same day to ensure you receive your order the next working day.

International

International deliveries can take 7 working days, and up to 4 weeks. The cost is £22.99 for orders below £50, £49.95 for orders above.

Returns

If for any reason you are not satisfied with your order, we provide free 365-day UK returns for all our customers. To initiate your return, simply contact us at team@healf.com, and we'll send you a return slip and help arrange a collection. The item you return must be sent in the same condition as received and inside the original packaging. Once received, we will notify you via email.

For international returns, we unfortunately do not cover the cost. However, we work with an array of carriers and can offer self-posting returns for customers shopping from outside the UK.