SIZING NOTE: These boots are Australian/UK sizing. The size on the actual boots you will receive is the Australian/UK size not US size. The sizing conversion to US size is shown in the size selection list box. EXAMPLE: 9 AU 3E (10 M US Mens) EXPLANATION: 9 AU - The Australian/UK Mens Size 3E - The width - EEE a wide fit suits most feet 10 M US Mens - The US Mens size BUILT TO LAST. This Aussie made work boot constructed from 2.5 to 2.7mm thick leather is 20% stronger than normal work boots and well over minimum international standard. The full chrome, oiled tannage means your boots are more resistant to hardening and cracking and hold their shape longer. Redback boots are made by the traditionally preferred cement lasted method whereby the leather is wrapped under the insole and fused under heat and pressure with high tech Polyester and Polamide molten sealant/adhesive. The Anatomic sole profile is designed to reduce arch flexion (sagging), subsequent foot fatigue and referred leg and back ache.