Where does the swell and tide data come from?

The paired phone pulls your surf app's buoy and tide feed over signal at the tailgate, pushes it to the BLE controller, and the sleeve renders the reading on the 8×32 matrix. Pad 1 refreshes any time the phone has signal.

Can I set it for my local break?

Yes. Open the Sleeve Studio app, edit the breaks with your break name, height, period, direction, and low tide, then send the mode to the sleeve.

Is the fabric safe for salt water and sand?

The matte-black compression fabric and sewn conductive pads are rated for cold hand-wash. Unsnap the removable BLE controller first, rinse in cold fresh water to clear salt and sand, then hang dry — never submachine or soak the electronics core.

Use Case #22 · Cluster D · Outdoor Sports & Adventure · All 50 Modes

Dawn-Patrol Surf & Tide Swell Pre-Check Ticker

Checks the live buoy reading 4.5FT @ 14S NW and the LOW 6:42A tide on the 8×32 RGB LED matrix at the tailgate, so you decide to paddle out without unlocking a wet phone. Five conductive-fabric pads refresh, cycle spots, and set a paddle alarm — $199 finished sleeve.

Decide before you suit up: Read swell height, period, direction, and tide on your forearm at the tailgate — a glance and you’re waxing up.
Wet, cold, sandy hands welcome: 5 sewn fabric pads work through a wetsuit cuff and with sand-caked fingertips; the pod slides out to rinse.
Pre-loaded & customizable: Ships as one of 50 built-in modes; set your own breaks, heights, and tide windows in the Sleeve Studio app.

Preorder Sleeve · $199 Free US Shipping Try in Sleeve Studio →

▶ See the 8×32 Forearm Display in Action

Watch the 8×32 RGB LED matrix and 5 conductive-fabric touch pads running cycling, running, navigation and commute modes on the forearm sleeve. Concept render · simulated 8×32 display · first production run of 500 units.

Why Wet Fingers and Cold Dawns Break Phone Swell Checks

No fogged screen at 5:40 AM: A glance decides the paddle-out while everyone else is still scrolling a wet phone at the tailgate.
Reads through a wetsuit cuff: The oversized sewn pads take a wet or sand-caked fingertip, and the pod slides out to cold-rinse after every session.
Pre-dawn ready: A 30% dim keeps the ticker readable in darkness without draining the battery before first light.

What Each Forearm Pad Does (Pads 1–5)

Pad 1 (Elbow)Single tap — Refresh buoy feed from paired phone · LED cue: 32-column swell bar repaints; "4.5FT @ 14S NW" scrolls

Pad 2 (Upper Mid)Swipe — Cycle saved break (OB → HMB → PLEASURE) · LED cue: Break name scrolls; accent cyan → amber → magenta

Pad 3 (Center)Double tap — Toggle tide block (LOW 6:42A ↔ next LOW) · LED cue: Tide row scrolls in teal

Pad 4 (Lower Mid)Press & hold — Set paddle-out alarm at next tide turn · LED cue: Matrix pulses twice; "PADDLE 06:40" locks

Pad 5 (Wrist)Press & hold — Battery-saver for pre-dawn darkness · LED cue: Drops to 30% with corner status pixel

Customize in 30 seconds: Pick this mode in the Sleeve Studio app, type or speak new words, colors, or pad actions, and tap Send over Bluetooth — no code.

Frequently Asked Questions

Where does the swell and tide data come from?: The paired phone pulls your surf app's buoy and tide feed over signal at the tailgate, pushes it to the BLE controller, and the sleeve renders the reading on the 8×32 matrix. Pad 1 refreshes any time the phone has signal.
Can I set it for my local break?: Yes. Open the Sleeve Studio app, edit the breaks with your break name, height, period, direction, and low tide, then send the mode to the sleeve.
Is the fabric safe for salt water and sand?: The matte-black compression fabric and sewn conductive pads are rated for cold hand-wash. Unsnap the removable BLE controller first, rinse in cold fresh water to clear salt and sand, then hang dry — never submachine or soak the electronics core.

Run This Mode on Your Forearm — Reserve Batch 01 ($199)

Complete hardware + 50 modes ($199): 8×32 RGB LED matrix (256 pixels), 5 sewn conductive-fabric touch pads, and a 5-second slide-out washable electronics pod.
Sleeve Studio app ships first: Personalize all 50 modes in plain words before your sleeve arrives (small monthly subscription; zero code).
Zero-risk preorder: First run of 500 units (~30 days to production), free US shipping, 100% refund anytime before shipping + 90-day money-back guarantee.

Preorder Sleeve · $199 Free US Shipping Open Sleeve Studio Full Hardware Specs

Watch → Prove → Buy

Not ready to order yet? Take the next step.

See the hardware in motion, read the peer-reviewed textile research behind it, or reserve your spot in the first production run of 500 sleeves.

STEP 1Watch the sleeve in action Five soft touch pads, an 8×32 RGB LED display, Bluetooth, and a removable electronics pod for gentle washing. See the hardware → STEP 2See how the app customizes any mode Pick from 50 pre-built modes or type a new one in plain words. The Sleeve Studio app ships before your hardware. See Sleeve Studio → STEP 3Preorder the Sleeve — $199 First run of 500. ~30 days to production. Free US shipping. Full refund anytime before it ships. Order now →

90-day money-back guarantee, plus a full refund any time before the sleeve ships.

Questions about your setup? Call +1 725-338-4835 or email alex@midnightdev.dev.