The top on page offer for Kiehl's is the 10% off storewide voucher at the top of this page, delivered by the 10% off voucher above, which is best for routine online purchases where you want a straight percentage off every item. If you prefer marked down lines instead, Kiehl's also has several sale promotions such as 40% off gift sets, up to 40% off selected products and up to 50% off selected items, plus a free gift on orders over $125.
Big basket, want a gift with purchase. If your cart is at least $125 and the free gift matters more than a small extra saving, use the automatic Free Gift With Order Over $125 offer. That deal requires a minimum spend of $125 and is not combinable with promo codes, so you cannot use the 10% off voucher at the same time. For example, on a $150 order the free gift becomes available automatically, while the 10% off voucher would reduce the total to $135 (10% percent, final price $135, you save $15). Choose the free gift only if its retail value or the extra product mix is worth more to you than the $15 saving from the code.
Buying gift sets. Gift sets are currently 40% off as a sale. The 40% Off Gift Sets promotion is not combinable with other promo codes or offers, so you must take the sale price rather than using the 10% off voucher. For a $80 gift set marked at 40% off, the price shown is $48 (40% percent, final price $48, you save $32). If the set you want is in that selection, the sale will beat the 10% code every time for that item.
Shopping selected sale items. For selected products showing up to 40% off or up to 50% off, the price shown usually already reflects the discount. The 40% off sale states it is not combinable with other promo codes. The up to 50% off offer notes the price shown already reflects the discount but does not explicitly say codes are blocked; however the 40% gift sets do state no combination, so assume sale items may be final price. For an item reduced from $60 to 30 at 50% off, the final price is $30 (50% percent, final price $30, you save $30), which beats 10% off that item.
Small carts and everyday buys. If you are buying a few full price items and no sale product or gift set is involved, the 10% off voucher above is the simplest saving. For a $40 full price purchase the voucher brings the total to $36 (10% percent, final price $36, you save $4).
To choose between the options, compare the final totals. Use the 10% off voucher for mixed full price purchases and when no sale item blocks codes. If the item you want is in a 40% off gift set or in a marked down selection showing 40% to 50% off, take the sale price because it will usually leave you with a lower total than 10% off. If your order reaches $125, weigh the free gift value against the 10% saving, remembering the free gift offer cannot be combined with promo codes.