Buy Jack Black Double-Duty SPF 20 for the long record: 9,316 ratings at 4.5 stars. Buy Kiehl’s Facial Fuel SPF 20 if you want it cheaper per ounce in the 6.8-ounce pump. Neither is SPF 30, so neither replaces sunscreen for a day outside. Check Jack Black’s drug-facts panel: FDA lists two formulas.
Most men assume Kiehl’s is the expensive one. In the size most of them buy, it is. At the large size, it isn’t.
On 3 October 2026 Jack Black Double-Duty Face Moisturizer SPF 20 was $32.00 for 3.3 ounces on Amazon. Kiehl’s Facial Fuel Energizing Moisturizer SPF 20 was $33.00 for 2.5 ounces and $52.00 for 6.8. Per ounce: $9.70 for the Jack Black, $13.20 or $7.65 for the Kiehl’s.
Both are daily moisturizers with SPF 20 built in, so they compete for the same spot on the shelf. Because they carry an SPF, both are over-the-counter drugs in the US. That means FDA holds a record of what is filtering the sun in each bottle, and we read it.
What does FDA’s directory say is in each bottle?
FDA’s National Drug Code directory lists every sunscreen’s active ingredients and strengths. We queried it on 3 October 2026.
| Listing | NDC | Listed since | Active ingredients |
|---|---|---|---|
| Kiehl’s Facial Fuel SPF 20 | 49967-608 | March 2018 | Avobenzone 30 mg/mL, homosalate 88 mg/mL, octisalate 49 mg/mL, octocrylene 59 mg/mL |
| Jack Black Double-Duty (older) | 66738-020 | May 2009 | Avobenzone, octinoxate |
| Jack Black Double Duty (newer) | 66738-771 | June 2025 | Avobenzone 2.2 g/100 mL, octocrylene 9.5 g/100 mL |
Kiehl’s uses four filters. Jack Black uses two, and has two records.
The older Jack Black listing names avobenzone and octinoxate. Its strengths are entered in units that don’t add up, so we haven’t printed them. The 2025 listing drops octinoxate and adds octocrylene. One Amazon reviewer, comparing the 3.3- and 8.5-ounce bottles, reported that the label listed only avobenzone and octinoxate, which fits the older formula.
We could not tell from the Amazon listing which version ships today. Neither could the reviews. If it matters to you, the drug-facts panel on the bottle will say. Octinoxate is the one Hawaii stopped allowing in sunscreens sold there from 2021.
Is SPF 20 enough?
For a commute and a day indoors, it’s something. The American Academy of Dermatology recommends SPF 30 or higher for everyday sunscreen. Both of these fall short of that.
Kiehl’s buyers notice. A July 2026 four-star said the only thing that kept it from five stars was that “it is only a 20 SPF”. If you work outside or spend a weekend on the water, put a dedicated sunscreen over either one.
The two bottles side by side
Read from the Amazon listings on 3 October 2026.
| Moisturizer | Size | Price | Per oz | Ratings | 5★ | 4★ | 3★ | 2★ | 1★ | 4–5 band | Seller |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Jack Black Double-Duty SPF 20 | 3.3 fl oz | $32.00 | $9.70 | 9,316 | 77% | 12% | 5% | 1% | 5% | 89% | Amazon.com |
| Kiehl’s Facial Fuel SPF 20 | 2.5 fl oz | $33.00 | $13.20 | 658 | 87% | 7% | 4% | 0% | 2% | 94% | Kiehl’s Since 1851 |
| Kiehl’s Facial Fuel SPF 20 | 6.8 fl oz | $52.00 | $7.65 |
Kiehl’s has the better distribution: 94 per cent against 89, and 2 per cent at one star against 5. Jack Black has fourteen times the ratings.
We rank on the larger sample. A distribution built from 9,316 people moves less than one built from 658. If Kiehl’s holds this shape as its count grows, the order flips.
What Amazon’s review summary flags
Amazon tags each listing’s review themes as positive, mixed or negative. Read 3 October 2026; the counts are Amazon’s.
Jack Black: effectiveness (1,157), moisturizing (480), non-greasy (298) and sun protection (161) are positive. Fragrance (410) and value for money (316) are mixed.
Kiehl’s: moisturizing (28), sun protection (20), fragrance (19) and non-greasy (18) are positive. Value for money (20) is mixed.
Fragrance is the useful split. Jack Black’s scent divides its buyers. Kiehl’s buyers mostly like theirs, on far fewer mentions.