They are made from 100% luxurious Australian double faced sheepskin. These sheepskin boots are very comfortable, as the sheepskin provides excellent insulation against the cold, but also absorbs excessive moisture while letting your feet breathe. The insoles are removable and replaceable. The top part of the boots can be folded over to show the beautiful inner wool. The specialty for all Sydney Rams Ugg Boots is the use of an extra piece of suede covering of the seam running straight down the back of the boot. The seam at the back of the boot is where it is most vulnerable; therefore having a covering will enhance durability and reinforce the boot. The outdoor tread sole is made from a high density rubber and is very flexible and resistant to harsh weather up to -40 degrees. The boots have reinforced suede heels and toe guards for increased durability, as well as a rubber lugged outsole for extra traction and slip resistance. These boots are ideal for outdoor adventures.