http://modsquadhockey.com/forums/index.php/files/file/187-2015-stx-hockey-catalogue/ In 2014, STX released a line of high-end sticks and gloves, and now have continued to round out their lines by adding a protective category to it. Protective - Just like with sticks and gloves, the Surgeon and Stallion lines are distinct with each other and play into the stories STX has been telling with each line. The Surgeon series is their "Precision Fit", which is an anatomical, sleeker fit. On the Surgeon 500 shoulder pad, it's all foam. Every bit of it is foam. But, some pretty cool features - the bicep pads don't have straps; it has a sleeve in which you slip your arm into. And on the bottom of the shoulder pad chest area, they have tabs that stick on top of the strap, providing a tighter fit and zero interference with the jersey sticking to the end of the strap. The Stallion is their "Power Fit" which means it is a more rugged pad. The padding is fuller, including more padding in the collarbone and ribs, and the sternum and spine plate is much bigger than what is on the Surgeon. The bicep pad is a two-piece pad as well, that can be adjusted for length. On the elbow pad front, the Surgeon is a 3 piece elbow pad and the Stallion is a 2-piece. Both feature the 360+ Strap, which is the bottom strap of the low pad - it goes completely around the forearm. The Surgeon has a full-length spandex sleeve, whereas the Stallion has a half-length sleeve. The Stallion does have additional protection in the forearm area, because, you know, rugged. The shins are also completely different. The Surgeon is going to be a bit tapered by design, and comprised entirely of foam. The 360+ strap wraps completely around the pad right below the knee, and has a neoprene strap that splits for two attachment points over the calf wing. The Stallion is wider and more of a traditional fit. Still has the 360+ Strap, however, has something very interesting - a cut-resistant sleeve. In this age of players getting cut behind the shin pad, that's a pretty cool feature. On the 300 series protective, you're still maintaining the same fit stories, however, the foams are down spec'd to less high-density foam (more EVA foam) but the 360+ Strap is still present.