TIMBERLAND PRO. A11RO. RIGMASTER WATERPROOF SAFETY BOOTS. BROWN.These 0A11RO214 Timberland PRO Men s Rigmaster XT Waterproof Safety Boots are designed with functionality and dependability in mind. Timberland PRO series helps working professionals perform at their best on the job. Timberland PRO Boot series delivers high performance Safety boots that provide comfort durability and protection.