Seeking Lululemon DP, buy online, free mail return, gift card, profit?

Before all the "jUsT buY sOmeThing bRo" comments, no. I pay my AF and can use my benefits how I like and I personally would rather not pay $90 for underwear. Would rather get gift cards cuz they make great gifts to loved ones.

Now that thats out the way, would this method work? I dont have a store close to me. Buy something online, do free return via mail, receive refund to gift card?

As far as buying and returning to physical store, Im assuming I cant do it in one go and would need to buy, wait for credit to post, then return?

TIA!