With mismatched tongues the Nike x Concepts Dunk Low Pro SB 'Holy Grail' features a silver iridescent upper with custom gold skull lace locks and a silver quilted heel collar lining, and an icy translucent outsole. The sneakers were released alongside the Nike SB Dunk High ‘Stained Glass’ and the Nike SB Stefan Janoski Max ‘Mosaic’ at Concepts stores in 2015.