, Billabong 5mm SG5 boot close split is a top of the range warm & 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, , Features, 5mm glued & blind stitched, Furnance thermal lining, Concealed split toe, Welded seams, Non marking soles, Adjustable arch strap, ., ,