Never ever cold little feet at night! Witlof for kids Tuck-Inn® duvet covers are made of high quality soft cotton and have elastic corners on one side. This makes the covers fit perfectly around the lower end of the mattress and makes it a lot easier to make a bed. Moreover, Tuck-Inn® avoids that even the most restless sleepy heads kick loose their bedding. Discover the full collection here. Available in various sizes.