Ugg - Sid (Chestnut) - Men's: Available in whole sizes only. If between sizes, order size down from your usual size. ; Step into pure comfort! This slipper features a big, fuzzy collar to keep your feet extra comfy. Ugg(R) sheepskin is naturally thermostatic and therefore will keep bare feet comfy in temperatures as low as -30 degreesF to as high as 80 degreesF. Designed to be worn barefoot to maximize the benefits of sheepskin. Fit should be snug, but not uncomfortable. Footwear will give a little as fleece footbeds form to each individuals foot. Ugg fleece wicks moisture away and allows air to circulate, keeping feet dry. Care and Cleaning Instructions