Billabong 5mm SG5 Boot. This is a top of the range Billabong wetsuit boot featuring a close split toe. Extremely warm, lightweight & comfortable boot that is single lined on the top for warmth. The sole is split into 3 sections for maximum maneuverability with the middle section double lined neoprene & very thin molding, 5mm Glued & Blind Stitched, Furnance Thermal Lining, Concealed Split Toe, Welded Seams, Non marking Soles, Adjustable Arch Strap, ,