Recover · Hot & cold
One gel-filled sleeve for the recovery half of your routine. Two hours in the freezer for cold, short microwave bursts for warmth, then it slides over the thigh, knee, calf, ankle, elbow, or forearm with a light stretch and 360° contact. Put your feet up for twenty minutes. No straps, no inserts, nothing to hold in place. Cold plunge, one joint at a time.
Construction: smooth stretch outer over a solid gel core. Wipe clean with a damp cloth. Never machine-wash, submerge, tumble-dry, or iron. Store flat at room temperature and freeze it two hours before you need it: left in the freezer around the clock, the gel can wear out sooner. Inspect for tears before each use; never heat a damaged sleeve.
Pick the zone, then measure the widest part of it. The sleeve stretches, so more than one size often fits: the smaller one holds firmer, the larger one pulls on easier. It works best with a light stretch, so between two sizes take the larger. We can't exchange sizes, so measure before you order. Full guide in Find your fit.
Cold: freezer, at least two hours. Wear 15 to 20 minutes, then a break.
Heat: from room temperature only: 30 seconds in the microwave, flip, 10 more, knead, test on your wrist.
Never straight from the freezer to the microwave or back: let it return to room temperature by itself in between.
Take it off after about 20 minutes, or sooner if it feels too cold or too warm. Not while sleeping. Not on broken or irritated skin. Circulation or sensation concerns, or a medical condition? Ask a professional first.
Orders are usually processed within 1–2 business days and shipped tracked. Import duties for US orders are included: nothing to pay on delivery.
30-day quality guarantee. If your sleeve arrives damaged or turns out faulty, email support@getrenavo.com within 30 days of delivery with a photo and we refund it. A gel sleeve costs too much to ship twice, so we can't take returns or exchanges for size or change of mind. Use Find your fit before you order.
Find your fit
Tap where it goes, then slide to your measurement. We'll tell you the size and how it will hold.
Where the sleeve sitsWhere to measure
Measure around the widest part of your thigh. Quad or hamstring, wide end up.
Sized from our own stretch tests on the sleeve. It works best with a light stretch, about a quarter.
| Size | Best for | At rest, wide / narrow | Length |
|---|---|---|---|
| S | — | 23 / 20 cm | 24.5 cm |
| M | — | 25 / 22 cm | 27 cm |
| L | — | 30 / 25 cm | 27 cm |
| XL | — | 40 / 34 cm | 27 cm |
The Recover beat
Athletes use cold after training and warmth before it. Now both live in your freezer.
Cold could be the oldest trick in sport for taking the heat out of a hard-working knee.
Step 2 is shown on a model; the freezer clips are our own kitchen.
Proof of concept
No voice-over, no music you'll hate. Three short clips: out of the freezer, onto the knee, back in the drawer, so you can see what the photos can't: it bends when frozen, and it goes on in one pull.
Where it goes
Elbow · S–MPickleball. Every pickleball player knows the Monday-morning knee. Heat before the first game, cold after the last.
Find my sizechevron_right
Elbow · S–MPadel & tennis. Cold after the match, on the elbow and the knee.
Find my sizechevron_right
Ankle · S–MHiking & long walks. Cold on tired ankles after the trail. Heat before the climb.
Find my sizechevron_rightInside the sleeve
One solid gel core. No liquid to leak, no insert to lose.
Stretches to
its resting size in our own pull test
Covers
a hand's width above and below the joint · 24.5 cm in S
Slides on with
straps, inserts or velcro
Black or navy. Sizes S to XL.
Bends when frozen. Straight from the freezer it still wraps the joint.
When to use
| Moment | Use | How long |
|---|---|---|
| Right after a hard session | Cold | About 20 minutes |
| The morning after, when it feels stiff | Heat | About 20 minutes |
| Before a session, on a cold morning | Heat | While you get ready |
| A spot that feels hot after a hard game | Cold | About 20 minutes |
| A fresh injury, sharp pain or swelling | Neither: see a professional first | — |
Never on broken or numb skin. About 20 minutes, then take a break. Check the heat on your wrist first.
Compare
Cold all the way round. An ice pack cools one side of the knee; ThermaFlex wraps the whole joint, front, back and sides at once. Nothing to hold, nothing melting on the sofa, and it does heat too.
ThermaFlex
Bag of peas
Velcro wrap + insert
Cold plunge tubFAQ
It's a recovery accessory for people who train: cold after a session to soothe worked muscles, warmth before one to help them loosen up. It's not a medical device and it doesn't treat injuries.
Cold after training, when muscles feel hot and tired. Heat before training, or when you feel stiff, to help muscles loosen up. For a fresh injury, sharp pain or swelling, see a professional first.
Use the size finder in Find your fit: pick the zone, measure around the widest part of it, and slide to your number. For a knee, measure just above it, where the thigh muscle meets the knee; for an ankle, around the ankle bones. The sleeve works best with a light stretch, so between two sizes take the larger one. As a guide: thigh XL, knee or calf L, elbow, forearm or ankle S–M.
It is made for the twenty minutes you spend off your feet. The fit that lets the gel work best is a light stretch: it holds lying down or sitting, and it will slide if you stand up. If you want a firmer hold on the move, the size finder shows the firmer size for your measurement.
Coldest in the first ten minutes, and still clearly cool against your skin at twenty. That is why we suggest a twenty-minute session: long enough for the ritual, short enough to fit before dinner. Give it at least two hours in the freezer first.
Yes, from room temperature: 30 seconds in the microwave, flip, 10 more, then knead and test it on the inside of your wrist. Never heat it straight from the freezer, and never heat a damaged sleeve.
No, and it doesn't need to: your body clears lactate within about an hour after exercise, and it isn't what makes you sore the next day. People use cold because it feels soothing on tired muscles, and that's what ThermaFlex is for.
The solid gel is designed to stay pliable, so the sleeve bends with the joint instead of fighting it.
Under loose layers, yes. It has some substance. Think joggers, not skinny jeans.
No. It is a recovery accessory for people who move. It does not treat, cure, or prevent anything. If you have a medical condition, or concerns about circulation or sensation, ask a professional before using cold or heat.
From our fulfilment partner's warehouse outside the US, tracked from dispatch. Orders are usually processed within 1–2 business days; your delivery estimate shows at checkout. Import duties for US orders are included: nothing to pay on delivery.
We can't exchange or take back a sleeve for size: a gel sleeve costs too much to ship twice. That is why the size finder asks for one measurement, names your size, and tells you which to take if you are between two. Not sure? Email support@getrenavo.com before you order and we'll size you.
The sleeve itself. If it arrives damaged or turns out faulty, a leak, a split seam, anything that isn't right, email support@getrenavo.com within 30 days of delivery with a photo and we refund it. It doesn't cover size or change of mind.
Before first use
Read this once before your first freeze or your first heat.
Never straight from one to the other.Not from the freezer into the microwave, and not from the microwave into the freezer. Let the sleeve come back to room temperature by itself first. For example: warm it before your run, let it cool to room temperature, put it in the freezer, and come back to a sleeve that is chilled and ready.
Keep it at room temperature and freeze it for two hours when you need it. Left in the freezer around the clock, the gel can wear out sooner, and we can't promise it will perform as long as it should. Store it flat, away from heat and sharp edges.
Wipe with a damp cloth and air-dry flat. No washing by hand or machine, no bleach, dry-cleaning, tumble-drying or ironing.
Stop using the sleeve. On skin: wash with soap and water. In eyes: rinse with water for several minutes. Swallowing the gel is strictly prohibited. Keep it away from children and pets.
ThermaFlex is a recovery accessory, not a medical device. Circulation or sensation concerns, or any medical condition? Ask a doctor before using cold or heat.
Move · the other half
ThermaFlex is the Recover. MotionKnit is the Move: full-length compression sleeves for the session itself. One for the work, the other for the twenty minutes after.
Shop MotionKnit
