Headcollars and Halters
The first criteria to look for in choosing your horse's headcollar or halter is comfort and fit. He's going to be wearing this piece of equine apparel mainly while at rest or while tethered (except perhaps during lunging) so he'll need it to be as cosy as a pair of slippers!
An adjustable headcollar or halter is useful to ensure a good fit - too tight and it can rub and cause injury; too loose and it could slip off or become caught on hedges or fence posts.
On the practical front there are many choices of material, from traditional leather to nylon or just plain rope. Durability depends on when, where and how you are going to use the headcollar, and how well you care for it. Leather is stylish for shows, nylon gives you colour options to match rugs and other equipment, rope is lightweight.