3.14.26 New Youth SS26 — "New Kids Arrivals"
SS26 youth collection launch. ~56K sends per variant, statistically significant.
| Metric | Control | MailTail | Lift |
|---|---|---|---|
| Open Rate | 72.48% | 77.02% | +6.3% |
| Click Rate | 0.75% | 1.09% | +45.3% |
| Revenue | — | — | +109.1% |
WINNERMAILTAIL
All case studies
Three tests. Three wins for UNRL.
The Minnesota-based athletic-leisure brand drove up to +109% revenue lift per campaign and lifted click rates by +45% with MailTail.
- AthleticLeisure & Performance
- TimberwolvesOfficial Collab Partner
- DTCSS26 Drops
Athletic-leisure apparel
Peak Revenue Lift
Avg. Open Rate Lift+7%
Avg. Click Rate Lift+40%
Klaviyo A/B test data, March 2026 — head-to-head sends with vs. without MailTail
High-intent drops buried under Promotions
UNRL ships seasonal collections and high-profile collabs (including their official Minnesota Timberwolves partnership) where every send needs to convert in the first 24 hours. Even with strong open rates, click engagement was leaving meaningful revenue on the table.
- ~70%Baseline open rate
- ~1%Baseline click rate
- FlatRevenue per send
Same creative, better inbox placement
UNRL ran three head-to-head A/B tests at 100% test size — same creative, same list, same send time, with and without MailTail. The MailTail variant won every test on every metric, all at 100% statistical win probability.
- Identical creative, identical lists, identical send times
- MailTail variant won opens, clicks, and revenue on every test
- Statistically significant at 100% win probability
- Set up with you within 12 hours, no template rewrites
The time slips.
Three head-to-head A/B tests across March 2026. MailTail won every metric on every test.
New Youth — SS26
Flagship test · 111K sends
UNRL × Timberwolves Collab
Collab announcement · 39K sends
3.10.26 Wolves Collab — "UNRL x Timberwolves | 03.28.26"
In-arena exclusive waitlist announcement. ~19.5K sends per variant, statistically significant.
| Metric | Control | MailTail | Lift |
|---|---|---|---|
| Open Rate | 77.44% | 82.25% | +6.2% |
| Click Rate | 3.88% | 5.31% | +36.9% |
| Revenue | — | — | +70.9% |
WINNERMAILTAIL
High Street II — SS26
Product launch · 112K sends
3.11.26 High Street II — "Introducing High Street II"
SS26 collection launch. ~56K sends per variant, statistically significant.
| Metric | Control | MailTail | Lift |
|---|---|---|---|
| Open Rate | 70.89% | 76.51% | +7.9% |
| Click Rate | 1.18% | 1.61% | +36.4% |
| Revenue | — | — | +61.2% |
WINNERMAILTAIL
How it was measured.
All data from Klaviyo A/B testing reports, March 2026. Each test compared the same email creative with and without MailTail at 100% test size, with statistical significance reported by Klaviyo at 100% win probability. Revenue figures reflect Klaviyo's placed-order attribution. Results may vary based on industry, list quality, and email practices.
The bottom line.
Across three A/B tests in March 2026, MailTail won every test on every metric.
- Open Rate Lift Range+6–8%
- Peak Click Rate Lift+45%
- Peak Revenue Lift+109%
On the New Youth SS26 launch alone, MailTail more than doubled revenue per send compared to the same email without MailTail — with 100% statistical significance reported by Klaviyo.
Race your own list next.
Join UNRL, Mina Baie, 100 Thieves, G FUEL, and other leading brands using MailTail to land in Primary and drive more revenue.
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