
I have a 3 liter Blowfish and love it. Never had any pain or discomfort. I can put just the one liter in for a short couple of hours ride, or fill it with three for a full day. The only problem I had was finding a replacement buckle for the chest strap, when the GF shut it in the car door. Ended up hacksawing the strap from her hydration pack and fettling to fit mine.