Tessabit's headline offer is an extra 20% off sale styles, which gives you a quick way to stack savings on items already reduced. This deal works best if you're shopping the sale section and want to maximize your discount on marked down pieces. For other situations, you may find a different offer saves you more money.
If you're shopping sale styles: The extra 20% off sale styles offer is your best bet. This stacks on top of existing markdowns, so you're getting a genuine additional reduction rather than a replacement discount.
If you're buying full price items: The up to 40% off selected styles deal applies to specific full price pieces across the range. Check whether the items in your basket qualify for this offer—if they do, it will save you considerably more than the sale discount would on those same products.
If your order reaches $600 or more: You'll qualify for free delivery. This is valuable if you're planning a larger purchase and would normally pay shipping costs, but you should still compare it against the percentage discounts available. For instance, if your basket totals $600 and would incur a $20 delivery charge, free shipping saves you $20—but if those items qualify for the up to 40% off deal, that percentage discount will almost certainly be larger.
If you're a new customer: Signing up to the newsletter gets you access to promotional discounts and special offers going forward, which could be worth doing before you shop. However, it does not give you an immediate discount on your first order, so if you're ready to buy today, one of the active deals above will save you money right now.
Since Tessabit allows only one offer at checkout, compare your specific basket against the available options and pick whichever produces the biggest saving. The extra 20% off sale styles and the up to 40% off selected styles are mutually exclusive, so identify which items in your cart qualify for each, calculate the resulting totals, and choose accordingly.