If you'd rather not spend much, your best bet is this The North Face Gilet. It's a great product, while not very costly. Another great option is this Joules Puffer Vest. While the price is not very high, be sure that this product will become a great addition to your wardrobe. You might also want to consider this Patagonia Gilet. The price is very reasonable, but the effect on your wardrobe will be pretty fantastic.