At Kmart, buy one activewear item, and get 50% off a second item of equal or lesser value. (Discount appears in-cart.) Choose in-store pickup to dodge the shipping fees, which start around $6. (You can also spend $35 or more to qualify for free shipping.) Some exclusions apply, including Hot Buys, Smart Buys, and clearance items.
Of note, Shop Your Way Rewards members will earn a Kmart credit with these purchases and may be eligible for additional credits and discounts.