The Trend-Setting Slip-On Recharged by Bold, Fresh Colours. The Colour Theory Collection allows you to create a unique colour story by pairing vibrant, unexpected hues with our iconic footwear styles. Made with an old school canvas upper featuring our signature checkerboard print, this seasonal Classic Slip-On Checkerboard honors our legendary laceless silhouette while offering a fresh look that boosts the appeal of this easy-to-wear shoe.