Season after season, you can count on the pro-preferred performance of the Union Atlas bindings! ; Stage III Duraflex ST Base is injected with Duraflex ST Nylon, becoming an even stiffer, all-mountain ripping machine. ; Atlas highbacks feature a super lightweight, streamlined design for a seamless boot interface with complete lateral freedom for maximum tweakage. ; Multi-Density Thermoformed Bushings sustain their function season after season. ; ExoFrame ankle strap provides the ultimate connection between rider and board, providing strength and instant response on the outside, with superior fit and comfort of the inside. ; Extruded 3-D aluminum heelcups act like a roll cage on a race car - stiffening the entire chassis. The male/female connection with the base provides seamless response. ; Magnesium ratchets are four times the strength of aluminum with only half the weight. ; Baseplate stiffness: 7/10 ; Highback stiffness: 6/10 ; Disk type: Universal Disk ; Imported.