Overview

• The UK is experiencing its first heatwave of the summer with temperatures peaking at 34C in the Midlands and South East on June 21.
• Specialists caution that sleeping naked allows sweat to cling to skin, disrupting sleep cycles and increasing overnight dehydration.
• Psychologist Suzy Reading advises loose-fitting garments in natural fibres such as cotton, silk, eucalyptus and bamboo for better temperature regulation.
• NHS GP Partner Dr Tim Mercer recommends wearing lightweight cotton or linen pyjamas, nightgowns or short sets to wick moisture away and maintain airflow.
• Despite cooler ambient temperatures after sunset, light sleepwear is essential to harness evaporative cooling and support restorative rest during warm nights.