Uhh...I love GVH, but that doesn't sound legal at worst, at best it's shit. Unless I missed it, their return policy affirms a 60 day unconditional guarantee of unworn merchandise and that restriction is not stated.
Edit: I did miss it. Here's the relevant section cut and pasted from a GVH e-bay listing:
"We currently ship to Canada, the Caribbean, Western Europe (excluding Italy, Greece, Hungary, Poland, Russia and the Czech Republic), Australia, and Japan (click here for a full list). Delivery time is 1-2 business days for most locations in Canada , and 2-3 days for most other locations.
Please note that FedEx Priority eliminates brokerage fees. You are still responsible for all Taxes & Duties - which will be charged upon delivery. Please contact your local FedEx agent to determine your estimated taxes & duties. All international shipments are thoroughly inspected to assure perfect product fulfillment. These will not be marked as a gift. Returns will not be accepted for international shipments."