Speedfil Hydration System Water Bottle Insulating Cover

Works well. A little bit of a learning curve in how best to quickly install it but it's not rocket science, people. Does offer some temperature control benefits but don't be fooled into thinking it will keep your drinks ice cold especially during hot training days and races. However, any lost cold is made up for with a snug fit that makes the bottle even more aero. Overall, I'm glad I bought this.

This speedsok is helpful to keep liquids cool during an event or while your bike is in transition On very hot days I use ice in the reservoir to start and then set up the system with the Speedsok. It gives you a little more time before the liquids get warm. The assembly is simple. I place the reservoir in the mount, then put the speedsok on (I don't bother with the fastener on the mount - have never had an issue with the reservoir popping out). Then the straw, then the lid. Plus, you have a few color options that look nice if you're into the style thing.

Keeps things cooler for a little longer.

Good fit

No problems with the cover yet, install was easy, would make the purchase again is needed. Shipment and cost were key.