Warmup
engineered.

Explore the sleeve

Take a closer look

Senses.
Then acts.

Drag to turn it. Tap a dot to see what each part does.

The KAILU sleeve on a thigh: hub pod on the outer quad, two satellite pods on the front, one lifted to show its gold contacts

Still
is cold.

The warmup ends. The waiting doesn't. Lines, drills, the sideline. Rest is not readiness.

  • 1.5–2°CLost from the quads over a 15-minute halftime.Mohr et al.
  • 2.4%Slower sprints straight after.Mohr et al.
  • 4–5%Peak power lost for every degree the muscle cools.Bergh and Ekblom
  • 9%Sprint power kept by holding muscle heat through a 30-minute wait.Faulkner et al.

How it works

Four jobs.
One sleeve.

The KAILU sleeve on a thigh with the heating zones glowing under the hub and both satellite pods
Movement-aware heat

Trackers hand you a number. Heat wraps act blind. Kailu does both.

A motion sensor in the pod notices when you slow down or stop. The heater then holds skin at target temperature, so the muscle keeps the warmth it built. While you move, it stays off to save battery.

Close view of the sleeve’s knit, stitching and bound edge

Buy the pod once.
Swap the sleeve.

Washable compression. Snap-in electronics. Quads, hamstrings, shoulders.

Where it stands

Built.
Next: athletes.

Working prototype

Version one heats, vibrates and senses temperature. It runs today on a hand-wired board.

Board, revision three

A custom circuit board through two independent engineering reviews. It adds motion sensing, EMG, a fused heater circuit with a hardware cutoff, and the snap-on contacts. Manufacturing files are ready.

Patent pending

Provisional patent filed in May 2026. A second filing, on the sleeve-and-pod design and movement-aware heating, is in preparation.

Next: athletes

The first sewn sleeve, rev 3 boards on a heater test rig, then a supervised warmup trial with 5 to 10 athletes. First testers are lined up across four college athletic programs.

Muscles don’t wait.

We won’t either. I tore my ACL warming up wrong. Standing around, then full speed. So I built the thing I wished I’d had: a sleeve that keeps the muscles going through the times we wait around.

First one on a perfboard at Texas Inventionworks during finals week. Three revisions since, a patent filed, and every dollar from businesses I run myself. No engineering degree, no team, no funding. Just an athlete, a problem, and a soldering iron.

Tanuj Shibu, founder. UT Austin, class of 2029.

Stay ready.

Between every effort.

KAILU