Can the whole class read the interval at once?

Yes. Hold your forearm up and the 8×32 matrix shows WORK 0:40 in neon green or REST 0:20 in red in letters tall enough for a full class to read.

Can I change the workout on the fly?

Swipe Pad 3 to cycle HIIT, EMOM, AMRAP, and Tabata presets, and hold Pad 4 to add 10 seconds to the current interval.

Will it survive a sweaty gym floor?

Unsnap the sealed LED and BLE module, hand-wash the compression sleeve in cold water after class, and hang it to dry.

Use Case #32 · Cluster D · Stage, Studio & Performance Pros · All 50 Modes

Group Fitness & CrossFit Coach Forearm Interval Board

Hold up your arm so the whole class reads WORK 0:40 in neon green and REST 0:20 in red — an 8×32 LED board and 5 fabric pads on your coaching forearm, $199.

The whole class reads it: Big neon-green WORK and red REST intervals face the room from your raised forearm.
Elbow-to-wrist control: Flip to REST, reset rounds, and add a +10s coach bonus with a tap, no phone on the floor.
Ready out of the box: Ships as one of the 50 built-in modes; set HIIT / EMOM / AMRAP / Tabata presets 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 timers, kitchen, focus, health and work modes on the forearm sleeve. Concept render · simulated 8×32 display · first production run of 500 units.

Why Phone, Watch, and Tablet Screens Fail at Coaching a Group Class

Mid-count, no free hands: You cannot open an app or hold up a phone while the whole class needs the next interval read off.
Readable across the floor: A glanceable, tap-through surface on your body stays exactly where your hands already are.
Peer-reviewed textile roots, shipping hardware: The Oct 2026 NUS Nature paper coined “garment GUI” with a lab-only woven pixel fibre (not for sale); our shipping $199 sleeve uses 5 sewn conductive-fabric pads and a removable 8×32 LED pod.

What Each Forearm Pad Does (Pads 1–5)

Pad 1 (Elbow)Single tap — Start the WORK interval · LED cue: Big neon-green WORK 0:40

Pad 2 (Upper Mid)Double tap — Reset the round counter · LED cue: ROUND 01/08

Pad 3 (Center)Swipe — Cycle presets (HIIT / EMOM / AMRAP / Tabata) · LED cue: Preset name, e.g. EMOM

Pad 4 (Lower Mid)Press & hold — Add 10s to the current interval (coach bonus) · LED cue: +10s flash

Pad 5 (Wrist)Single tap — Jump to the REST interval / next round · LED cue: Red REST 0:20

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

Frequently Asked Questions

Can the whole class read the interval at once?: Yes. Hold your forearm up and the 8×32 matrix shows WORK 0:40 in neon green or REST 0:20 in red in letters tall enough for a full class to read.
Can I change the workout on the fly?: Swipe Pad 3 to cycle HIIT, EMOM, AMRAP, and Tabata presets, and hold Pad 4 to add 10 seconds to the current interval.
Will it survive a sweaty gym floor?: Unsnap the sealed LED and BLE module, hand-wash the compression sleeve in cold water after class, and hang it to dry.

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.