I was also in Boston over the summer. We visited Premium Outlets in Wrenthan several times until we found Vanity Fair.
The deal here is that you pay 1/2 the lowest ticket price displayed, so you have prices that have been reduced several times in the original shop and are then sent here. It wouldn't have the same selection as Wrentham but there were mega bargains to be had, (and that from someone who has an admitted aversion to spending money). Between the weak dollar and getting quality clothing for 1/2 price the little Murts or the older Murts won't want for anything for a couple of years.
On the second visit Mrs Murt refused to go to the checkout as she had pigged out so much on a the previous visit two day earlier, and the same checkout operators were there.
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The place is about 50 miles outside Boston but well worth a visit.
Murt