Most of us whether training or racing will use some form of carbo-gels or electrolyte drinks. All Nathan has done, is just made it easier for us to carry them around. During longer distance races, I found Nathan’s Speed 2 Nutrion Pak was extremely comfortable, convenient and simple to use. One of the biggest benefits I found with this Pak over its competitor was the molded holster. It was like having a water bottle cage on your bike, attached to you. For the fashionable people these holsters come in 3 different colours; grey, blue and pink. Not only was it quick to access the flask, it was just as fast to replace it. The Speed 2 holds 2 x 10 oz. nutrition flasks. It also has a velcroed stash pocket. I’ve found it useful in carrying salt capsules and a few extra gel paks. Another thing I found great about this product were the wide openings on the flasks. After a race, the last thing I want to do is wash out my flasks. They usually sit around until a day before my next race. These wide openings made it easy to clean out all the backwash plus any other surprises one might find after a week.