Research: babies' sleep under a NUNKI sheet in nurseries

Frederieke
2 September 2025

A four-week investigation.

Babies' sleep under a NUNKI sheet in nursery. A four-week
rigorous research. Wageningen University is set to commence research into the effect of the NUNKI sheet on the sleep of babies in childcare. This four-week study will compare the sleep of babies sleeping under a NUNKI sheet with babies receiving standard care.

Healthy babies between 2 and 6 months old who attend daycare can participate in the research taking place at various daycare centres. Participating babies will be involved in the research for four weeks.

Previous research has shown that swaddling can have a positive effect on the sleep behaviour of restless babies with sleep problems.* With this new research, the scientists hope to gain a better understanding of how the NUNKI swaddle contributes to babies' sleep quality. The research results are expected to be published in a year's time.

Source: van Sleuwen et al., 2006

Frederieke Meihuizen

Owner Fedde&Kees®

I'm Frederieke, married to Ewoud and mum to four little ones. After living in many places, I've settled in Nieuwkoop. I worked in sales until my fourth child was born. Fedde was a colicky baby, and it was out of this desperation that I came up with the Fedde&Kees products. I turned my life upside down and started my own business. Since 2018, I've been helping other parents to get better sleep!