Men's Guaranteed Waterproof “outdoor Performance” Hiking Boots With B.s.f.p. From Timberland. Choose From All Leather Upper (602671) Or Leather/cordura Fabric Upper (602672). Both Offer The Motion Efficiency System B.s.f.p. (braking, Supporting, Flexing, Propelling). Timberland Developed A Rubber Sole With A Lug Pattern That Follows An “s” Shaped Pattern For Improved Performance In Those Four Areas. Both Styles Feature Padded Collars; Padded Tongues; Nylon Shanks; Rubber Toe Guards; And Removable, Contoured, Cushioned Insoles. 602671 Features A Leather Lining, 602672 Has A Gore-tex Lining.