UGG Tasman - Men's Slippers : Key Lime : Casual, yet rugged, classic slipper. The Tasman always fits tight at first especially if someone has a high instep or high volume foot. It does stretch out over time. If you are in between sizes, please size up or down based on the volume of your foot and height of your instep. The UGG Tasman is a casual, yet rugged, classic slipper. Sheepskin laminated to cow suede adds durability to uncompromised comfort. Sheepskin laminated to cow suede adds durability