Their site runs on Shopify, so once you hit checkout, you'll get the usual options: Klarna, PayPal, and Apple Pay alongside standard credit cards. If you want to split payments, Klarna pops up right at the final billing step. Just toss an item in your cart and click through to verify before committing.

Head straight to the return portal link in their site footer—don’t just mail it back to the sender address or support won't track it. You’ll punch in your order number and email to generate the prepaid label. Just heads up, they usually deduct a return shipping fee right off your refund.

Stronger’s sales are totally random outside of Black Friday. Honestly, don't wait on seasonal drops. Just scroll straight to their permanent outlet section or sign up with a burner email to grab the 10% welcome code. Note that the promo code box at checkout won’t let you stack that with existing markdowns, though.

Stronger doesn’t do an official birthday code. Honestly, don't wait on one. Your best bet is just making a burner email for their newsletter popup, or leaving items in your cart overnight to trigger an abandoned cart discount. Check their outlet tab too—site promos rarely stack on already marked-down tights anyway.