Loop Earplugs' headline offer is 5% off sitewide, which applies to any purchase you make right now. This is the best starting point for smaller orders, though you'll find better value if you're spending a bit more because Loop has tiered discounts that kick in at higher price points.
For orders under $59, the 5% sitewide discount is your best option. This will save you around $2.50 to $3 on a $50 to $60 purchase, which is straightforward and applies to everything in the store.
For orders between $59 and $79, you can choose between the 5% sitewide deal or the 10% off orders over $59. At $60, the 10% discount saves you $6 compared to $3 from the sitewide offer, so the tiered deal is worth switching to.
For orders between $79 and $109, the 15% off orders over $79 becomes available. This will save you around $12 on an $80 purchase and $16 on a $109 purchase, making it noticeably better than the 10% tier below it.
For orders over $109, the 20% off orders over $109 deal gives you the deepest discount. On a $150 purchase, you'll save $30 instead of just $15 from the sitewide offer, so this tier is worth aiming for if you're stocking up on multiple products.
If you're buying the McLaren Racing Bundle, check whether the free gift offer applies to your order—this could be a nice bonus on top of the percentage discount, though the gift itself won't reduce your total cost.
For shipping, Loop offers free shipping on orders over $64. If your basket is slightly under that threshold and you're paying for delivery, it might make sense to round up your purchase to hit both a discount tier and the free shipping benefit.
Since only one offer applies at checkout, compare the savings in your basket before completing your order. Work out what each available tier saves you—the system will likely show the best discount automatically, but it's worth double-checking that you're getting the largest saving available on your specific purchase.