- fleece interior - soft suede sole - elasticated ankle - promotes learning to walk On a very sober ecru white background... Our model of Rouge-Gorge cotton slippers is a simple and delicate model! The upper of the slipper is made of cotton twill lined with very soft, fleecy cotton to protect little feet. The suede sole (turned cowhide leather) is lined with a very thin, padded insole. Each pair of cotton slippers comes in a natural, reusable burlap bag.