The D2 VF 73 is a narrower version of the VF 75, with a less-expensive and less demanding binding interface that makes it a more forgiving frontside carver. Atomic' s Doubldeck, or D2, construction features a top core and a bottom core (the two "decks") separated by shock absorbing material. The flex starts soft but gets progressively stiffer at higher speeds (Atomic calls it Varioflex, or VF), while the skier, riding the top deck, is insulated from balance-compromising shocks. The harder you push it, the more it pushes back. The lower core is milled foam.