In reply to George Fisher:
I ship to the USA sometimes, if it´s value is over $200 then you start paying duty/tax. You need to fill out an export declaration, my products are non-dutiable but I still need this.
There are loads of special rules and quotas regarding textiles so best of luck!
Normally the customs offices themselves are dead helpful, they´ve always responded promptly to questions even if actually getting the stuff through takes an age!