★★★★★ This is great for the intended purpose
This is great for the intended purpose. I wasn't sure it would work with my double bridle but it fits around both bits just fine, and warms them just right. It doesn't hold heat for a long time but I put it on before I start tacking and then remove it and toss it in the groom tote just before bridling (10-15 min). It's small and portable, reusable, and so convenient. It takes a good massage to get the crystals soft and well-distributed but this gives me a chance to warm up my fingers anyway. If you don't try and use it for an extended time it works really well. This winter has been brutal in New England and using my hands I can't get the bits warm enough for my horse to accept them easily, plus I have to start my ride with cold fingers. When I use the bit warmer he takes the bits right away and I can keep my hands warm! I wish they sold heat packs separately so I had some extras; don't buy the hotsnapz pocket warmers; they have the right dimensions but are too bulky for this application.