The Apex DP is our 2 pin container. We have combined the best features of the Warlock and the Vertex 2 to come up with a hybrid of the two. New or refined features include a tucking pin cover flap, more stable riser tuck tabs, shaped bottom corners which incorporate a bridle protector flap, increased comfort over the shoulders, a stash bag pouch on the backpad, a more aerodynamically streamlined shape, and wider leg webbing to increase comfort, and more. We have taken our combined experience over the last 20 years and come up with what we feel is our most refined rig yet. As far as sizing your DP, we like a bit of a loose fit (easier to pack and more comfortable to wear). This allows you to upsize your canopy without having to change rigs. This sizing is based on a non-vented canopy, so if your canopy has vents, you should indicate this on your order form. Also, if you would prefer a tight fit/firm container, you can request this on your order form and we will build your rig 1 size tighter.