Review on 🏃 Hydrapak Velocity IT Insulated Water Bladder/Reservoir - Running Hydration Vests, 1.5-Liter (50 oz.), Reversible for Effortless Cleaning, Safety & Dependability by Brad Lovro

Better than expected. I think the extra insulation made a difference in warmth without much weight gain. For me a very successful exchange, I'm curious how it behaves in winter. I had a neoprene sleeve that worked really well on my old bladder, but added way too much bulk and weight, not to mention the extra step of filling it up in the infirmary. I have a real test taking place on 7/10/21 so I'll update if it doesn't work.