MILE 21 // BATCH #001 ROTATION KIT ($39)
SECURE TUBES →
MILE 21 PERFORMANCE
ELBURN LABS // BATCH #001 SYSTEM
ACTIVE FORMULA: 100G INDICATING [SiO2] + USP L-MENTHOL
PEBA & CARBON-PLATED MIDSOLE PRESERVATION

STOP LETTING $250 FOAM ROT.

Sweat hydrolysis breaks down super-shoe foam rebound 30% faster than road impact. Mile 21 extracts 15mL of trapped moisture in 6 hours overnight—extending the lifespan of your rotation.

SECURE RECOVERY SYSTEM →
01 // THE DEGRADATION

SWEAT HYDROLYSIS

Every long run deposits 10–20mL of corrosive salt water deep into your midsole foam. Left trapped overnight, moisture permanently breaks down PEBA and EVA cell walls.

02 // THE EXTRACTION

OVERNIGHT EXTRACTION

Two 50g breathable stockinette pods slip effortlessly into the toe box post-run, drawing footwear bone-dry within 2 to 6 hours without thermal damage.

03 // THE TELEMETRY

90-DAY WEAR GAUGE

Active neon-orange silica beads shift smoothly to dark forest green as they reach moisture saturation over 90 days—providing clear optical proof of performance.

SYSTEM: M21-CRYO // 2x 50G EXTRACTION PODS
Mile 21 — Super-Shoe Moisture Extraction Pods
OPTICAL SATURATION WEAR-GAUGE
DAY 01: NEON ORANGE (100% DRY) DAY 90: DARK GREEN (RELOAD)
SHIPS DIRECT FROM ELBURN, IL LABS

Mile 21 — Super-Shoe Moisture Extraction Pods

Housed in high-airflow matte black cotton stockinette and sealed in a vapor-lock Mylar barrier pouch. Infused with pure USP L-Menthol crystals for clinical post-run odor neutralization.

SELECT EXTRACTION TIER:
Single Pair (1 Pouch / 2 Pods) 2x 50g Extraction Pods + Mylar Barrier Pouch (1 Pair of Shoes)
$24
RECOMMENDED // SAVE $9
2-Shoe Rotation Kit (2 Pouches / 4 Pods— Save $9) 4x 50g Extraction Pods (2 Pouches — Daily Trainer + Race Pair)
$39
LABORATORY SPECIFICATIONS
ABSORPTION CORE 100g (2x 50g) Grade-A Indicating Silica [SiO2]
VAPOR INFUSION Pure USP Crushed L-Menthol Cryo-Crystals
SLEEVE MEMBRANE High-Airflow Matte Black Cotton Tubular Stockinette
STORAGE BARRIER Resealable Matte Black Mylar Vapor-Lock Pouch
EXTRACTION CYCLE ~2 Hours (Recovery Walk) // 6 Hours (Marathon Long Run)
// FIELD TELEMETRY & VERIFIED RUNNERS

PROVEN ON THE ROAD.

+14.2G
OVERNIGHT SWEAT EXTRACTION

"We weighed a carbon-plated racing shoe immediately post-long-run, dropped in the 100g silica system, and re-weighed 6 hours later. Pulled 14.2 grams of corrosive salt water straight out of the PEBA foam core."

ELBURN LABS // BENCHMARK TEST #04
★★★★★
SAVED MY RACE ROTATION

"Running in humid weather destroys expensive shoes in a month. These slip right into my Alphaflys overnight. They're bone dry by morning, and the subtle menthol completely neutralizes locker-room funk."

MARCUS L. // SUB-3 MARATHONER
90 DAYS
ACTIVE WEAR-GAUGE CYCLE

"The optical color shift is brilliant. You don't have to guess when they're expired—the neon orange beads slowly shift to dark green over 3 months of daily training before it's time for a fresh reload."

SARAH K. // ULTRA-RUNNER & COACH
// FIELD INTELLIGENCE & FAQ

FREQUENTLY ASKED QUESTIONS

Will the menthol transfer or ruin my shoe lining?
No. The pure USP L-menthol is dry-blended with the silica beads inside breathable cotton stockinette. It releases a clean, dry vapor that neutralizes foot odor and refreshes the sockliner without leaving any oily residue or wetness on your carbon-plated foam.
How do I know when it's time to replace the tubes?
Look at the beads through the black cotton knit or check the included wear gauge. When the active neon-orange beads completely shift to a dark forest green (typically around 90 days of daily use), the silica is fully saturated and ready for a fresh reload.
What size shoes do these fit?
The 50g flexible stockinette tubes are engineered to mold and compress, sliding effortlessly into everything from a tight size 7 carbon-plated racer (Vaporfly/Alphafly) up to a bulky size 14 daily trainer.