Uploaded April 2026 | Updated September 2026, 1 week ago
Caeleb Dressel left Speedo to co-design a tech suit with a brand most people have never heard of. I flew to Tenerife to test the DeBoer Dressel Speed 1.0 — against the Mizuno GX Sonic VI NV (my benchmark), DeBoer's own Cove, and a prototype that's not out yet.
Two days of sprints in T3's flume system with Pablo Marcos at ProEnduranceLab. We measured VO2, blood lactate, muscle oxygenation (Moxy NIRS) and heart rate at constant pace — with stroke rate as the control variable to make sure it's the suit doing the work, not me swimming differently.
This is NOT a review. It's a first-look at the data: objective numbers, side-by-side comparisons, and my first impressions of a suit designed by one of the greatest sprinters in history.
🔬 WHAT WE TESTED
→ DeBoer Dressel Speed 1.0 (Caeleb Dressel's co-designed race suit — launched March 2025)
→ Mizuno GX Sonic VI NV (benchmark)
→ DeBoer Cove (DeBoer's original race suit)
→ [PROTOTYPE] — you'll have to watch next video
📊 KEY METRICS
→ Heart rate | Blood lactate | Muscle O2 saturation | Energy expenditure | Stroke rate
⏱️ CHAPTERS
00:00 – Intro
01:03 – Mizuno GX Sonic VI NV Overview
01:50 – First Look at DeBoer Dressel Speed 1.0
02:26 – DeBoer Cove Overview
02:54 – What was tested
06:27 - Trying the DeBoer Dressel Speed 1.0
09:08 - Testing DeBoer Cove Tech Suit
10:32 - Results
🛒 Buy Tech Suits from SwimOutlet (affiliate):
swimoutlet.com/?teamid=47870
📋 Find Your Perfect Tech Suit:
theswimsuitguy.com/which-tech-suit-should-i-buy
🏋️ Swim Training Plans:
theswimsuitguy.com/swim-programs
👕 TheSwimsuitGuy Merch:
theswimsuitguy.com/shop-collection
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*All testing conducted at T3 Tenerife Flume, ProEnduranceLab, by Pablo Marcos. Constant pace 2.10 m/s. Stroke rate held within 2% across all suits to isolate suit-driven physiological differences. Not a sponsored video unless stated otherwise.*
Caeleb Dressel left Speedo to co-design a tech suit with a brand most people have never heard of. I flew to Tenerife to test the DeBoer Dressel Speed 1.0 — against the Mizuno GX Sonic VI NV (my benchmark), DeBoer's own Cove, and a prototype that's not out yet.
Two days of sprints in T3's flume system with Pablo Marcos at ProEnduranceLab. We measured VO2, blood lactate, muscle oxygenation (Moxy NIRS) and heart rate at constant pace — with stroke rate as the control variable to make sure it's the suit doing the work, not me swimming differently.
This is NOT a review. It's a first-look at the data: objective numbers, side-by-side comparisons, and my first impressions of a suit designed by one of the greatest sprinters in history.
🔬 WHAT WE TESTED
→ DeBoer Dressel Speed 1.0 (Caeleb Dressel's co-designed race suit — launched March 2025)
→ Mizuno GX Sonic VI NV (benchmark)
→ DeBoer Cove (DeBoer's original race suit)
→ [PROTOTYPE] — you'll have to watch next video
📊 KEY METRICS
→ Heart rate | Blood lactate | Muscle O2 saturation | Energy expenditure | Stroke rate
⏱️ CHAPTERS
00:00 – Intro
01:03 – Mizuno GX Sonic VI NV Overview
01:50 – First Look at DeBoer Dressel Speed 1.0
02:26 – DeBoer Cove Overview
02:54 – What was tested
06:27 - Trying the DeBoer Dressel Speed 1.0
09:08 - Testing DeBoer Cove Tech Suit
10:32 - Results
🛒 Buy Tech Suits from SwimOutlet (affiliate):
swimoutlet.com/?teamid=47870
📋 Find Your Perfect Tech Suit:
theswimsuitguy.com/which-tech-suit-should-i-buy
🏋️ Swim Training Plans:
theswimsuitguy.com/swim-programs
👕 TheSwimsuitGuy Merch:
theswimsuitguy.com/shop-collection
---
*All testing conducted at T3 Tenerife Flume, ProEnduranceLab, by Pablo Marcos. Constant pace 2.10 m/s. Stroke rate held within 2% across all suits to isolate suit-driven physiological differences. Not a sponsored video unless stated otherwise.*
