The biggest thing to be cautious of is any heat trapping. So no neoprene, SMBs, etc.. as these boots will cause more harm than they protect from.
I use polos with Eskadron liners underneath to dissipate heat. I also have a few sets of the EcoGold boots. Both options keep the legs quite cool and protected. In hot weather I will often ride with bare legs as well.
Bells on front and possibly back depending on if the horse interferes I will do as well. Posted via Mobile Device
We have used a lot of different things. Open jumping boots with bell boots for horses that overstep and clash their shoes together.
Polo wraps, polo wraps with lining under, these new closed soft boots, Eskadron had them first I think and then BR - oh, they seem to be called tendon boots.. all kinds of things.
Now I do dressage work basics and we don't use anything. When using cavalleti, or doing some jumps, we use the first pictured boots.
I like not using anything, but especially shod horses who like to tangle their legs need something, or they will hurt themselves. Atm I have a barefoot horse, and he does not really need boots as I have never heard them clack together
I prefer to bandage with Eskadron climatex underneath, but in reality I rarely have the time to wrap. I have Eskadron open front brushing boots that I really like, they breathe well, don't allow grit into them and give sufficient protection from knocks. Bell boots on fronts, occasionally behind as well.
In really hot weather (our summers usually sit around 38*C + during the day), I will only use bells and generally won't do a heck of a lot of work anyway due to the heat.