Our Take 

Saucony has three shoes in their Endorphin lineup.  The Endorphin Pro 3 is a carbon-plated speed shoe mean for race day, the Endorphin Speed 3 is a nylon plated speed shoe that has a little more durability than the Pro and is meant for fast training and intervals.  It is perhaps a little less responsive without the carbon plate, but it is also a bit more comfortable for training.  The Endorphin Shift 3 is that every day trainer for the runner looking for more cushioning and again more durability, but wants the feel of a faster shoe with more rocker.  It is also slimmer fitting than some of the other maximal type shoes on the market which some people will appreciate. 

 Specs

• Midsole Drop – 4mm
• Heel Stack – 39mm
• Forefoot Stack – 35mm
• Weight – 8.1oz

Technology 

• SPEEDROLL Technology propels you forward effortlessly.
• A taller bed of PWRRUN foam cushioning comfortably cushions your stride.
• Streamlined heel cup hugs and supports your foot with less weight.
• Deeper FORMFIT design hugs every part of your foot for a personalized fit and feel.
• New torsional heel groove provides a smoother transition from heel to forefoot.
• Lightweight, breathable mesh.
• Durable XT-900 rubber outsole.
• PWRRUN+ sockliner for comfort.
• This style is vegan and contains recycled materials.