The Back to School deal offering 20% off orders over $100 is Niidor's headline offer and works best if you're spending above that threshold. Whether this deal or one of Niidor's other active promotions saves you the most money depends on your basket size and what you're buying.
Small baskets under $59: If you're buying a single item or smaller order, check whether the Buy 2 Get 1 Free promotion on adhesive bras applies to your selection. If not, you might want to consider signing up to the newsletter for 15% off your first order—this is often a sensible starting point for new customers who don't yet qualify for larger discounts.
Baskets between $59 and $100: The free shipping offer on orders over $59 kicks in at this point, which can represent solid savings depending on your location. If your order sits in this range, compare the actual dollar value of free shipping against 15% from the newsletter signup to see which helps more. The Free Pairs of Nipple Cover deal (when you buy 2 items) may also apply if you're picking up multiple pieces.
Orders over $100: The Back to School 20% discount applies here, and this is typically the strongest deal for standard shopping. However, also check whether the Up to 35% Off Niidor Essential Bundles offer covers your items—if you're buying bundles specifically, this could save you more than 20%.
Buying adhesive bras: The Buy 2 Get 1 Free offer is worth isolating. Calculate the value of a free pair against percentage discounts to see which route saves more on your final total.
Remember that at checkout, you can typically use only one offer. Compare the actual savings across your basket with each applicable deal and select whichever one reduces your final bill by the largest amount.