The sleek top half and distinctive end pieces define these oversized frames as Bostons. Crafted with Airframe construction, the Airframe Slim Oversized 220 ensures ultra light comfort, and the adjustable bridge pads add to the overall comfort and fit. Every JINS purchase includes free shipping, a 30-day return policy, and a 1-year limited warranty. If you visit any JINS store, you can receive a complimentary, no-hassle adjustment with your order.