The Spectrum 105 has Elan’s Amphibio Profile, which creates a cambered inside edge and a rockered outside edge (and a right and left ski). In narrower skis, testers thought Amphibio added stability and maneuverability and true to form, testers said the Spectrum 105's best asset was stability. “This is a good ski for those who do not read slow signs,” Bills said. “It has good edge hold at speed.” Other tech details include a wood core, vertical sidewalls and a diamond tip and tail designed to enhance flotation. “It lacked energy and spring, but felt stable in medium to long turns,” Witman said.