With details that it make it more comfortable for your horse, the Vespucci Jumper Breastplate with Running Attachment is an excellent choice. It's padded at chest yoke and over withers. Double elastic on shoulders increases range of motion. Stainless steel hardware at yoke is positioned to prevent chafing and rubbing.
The Wellington Five-Point Competition Breastplate features the popular 5-point attachment for optimal fit and comfort. Made of premium quality bridle leather that only gets better with time.