The Mya No. 4 is similar in shape, construction, application and target ability to the men's REV 78, offering good price-to-performance value for groomer-centric carving at moderate speeds. It's a metal-free, foam-core laminate layup, but where most foam-core skis are cap constructions, the My No. 6, which will sell for around $500 (with 10-DIN Head Mya PR binding) in most shops, still features the sturdy, grippy edge feel of vertical sidewalls. The signature technology is Head's ERA 3.0 design philosophy. The "3.0" refers to the fundamental triad of radius (ie. sidecut), rebound (ie. flex), and rocker. Head designs all ERA skis so that these three fundamentals work in harmony, specifically adding more width at the tip so that the introduction of tip rocker doesn't compromise turn initiation. Head's Allride Rocker combines 80 percent camber for edge and rebound with 20 percent tip rocker for soft-snow flotation and shock absorption.