Return policy comparison · 2026
K18 vs Think Sun
Policy data verified July 24, 2026 by the Thrifle team
Winner
K18
A-
4.0 / 5.0 · Very Good
Think Sun
C+
2.4 / 5.0 · Fair
The verdict
K18 has the more generous return policy in 2026, grading A- (4.0/5.0) against Think Sun's C+ (2.4/5.0). It wins 2 of 5 scoring axes; the biggest gap is the return shipping: free returns (incl. by mail) versus customer pays return shipping.
Score breakdown
Five axes, 5.0 points total — the same deterministic grader behind every Thrifle policy page.
K18Think Sun
Return window · worth 2.0
Restocking fee · worth 1.0
Return shipping · worth 1.0
Holiday window · worth 0.5
Transparency · worth 0.5
Key terms side-by-side
| K18 | Think Sun | |
|---|---|---|
| Return window | ✓ 90 days (direct website purchases only) | 45 days from delivery |
| Free returns | ✓ Yes | No - customer pays return shipping |
| Restocking fee | None | None |
| Return shipping | — | Customer pays return shipping; original shipping and handling charges are non-refundable |
| Holiday extension | None published | None published |
| Non-returnable | Products bought at partner salons (must go back to that salon, not K18 directly) | Used or opened products, items purchased from unauthorized sellers (warranty does not apply and returns must go through that original retailer instead) |
| Watch-out items | — | — |
K18 tip
This generous 90-day window only covers orders placed directly on k18hair.com — if you bought it at your salon, K18 corporate won't take it back, you have to go through the salon itself.
Think Sun tip
If you bought Think Sun from a reseller instead of thinksun.com directly, don't bother contacting Think - you have to go back to wherever you actually bought it since their warranty and returns only cover direct purchases.
Frequently asked questions
Who has the better return policy, K18 or Think Sun?
K18 has the more generous return policy in 2026, grading A- (4.0/5.0) against Think Sun's C+ (2.4/5.0). It wins 2 of 5 scoring axes; the biggest gap is the return shipping: free returns (incl. by mail) versus customer pays return shipping.
What is K18's return window?
K18's return window is 90 days (direct website purchases only).
What is Think Sun's return window?
Think Sun's return window is 45 days from delivery.
Does K18 or Think Sun offer free returns?
K18: Yes. Think Sun: No - customer pays return shipping.