What kind of packs in the cooling vests?

[Guest guest]

I'm having some friends work with me on making a few variations to see

what might work for Jack.

There are some cloth diapering materials I've worked with in the past

that don't allow moisture to pass through, but also allow air to flow.

I just need to know where to get the best cool packs. I think I've

found a supplier, but they're $100 for four (no evaporation cooling,

no conensation) and there must be another option.

--

Mom to Madison, Skylar, on, Piper, & - diagnosed with

infantile scoliosis at 10 months with a 70° right thoracic curve.

Currently undergoing serial casting.