For an extra boost of weather defense, try the Fleece Mid-Layer Jacket under your riding gear. Windproof panels block chilly gusts. And by incorporating bulk-free stretch sides, you still have excellent range of motion even with the extra layer. This one is a great option on its own as a casual men's fleece jacket, too.
Two-layer bonded 100% polyester fleece windproof panels on body
Polyester stretch underarms and side panels for reduced bulk