reviewed the new Thunder 70 pack (click here to go to the review). 

If you are reading this blog post in January or early February of 2015 you won't find the Thunder 50/70 on our website quite yet. But because this review has gone live a little bit ahead or our schedule, we're linking to hit here. The Thunder series uses the same T-Rex frame as our popular, award winning Lightning 45/60, but the pack bag is designed with a few more features than the Lightning, which is a minimalist pack. Top loading with free-floating and removable top lid, large top pocket, dual zipper front panel for rapid access to main compartment, scapula pads for extra comfort - these features help Thunder achieve a careful balance between light weight, comfort, carrying capacity (weight and volume) and convenient featuring.