16/20
people showed less strain on the patellar tendon with a strap
That's the spot our pad sits on, just below the kneecap. It's also why physios often suggest a patellar strap for jumper's knee.
Dennis and 200,000+ others bought it
4.8/5 · 12,400+ reviews
Physios' Choice
Recommended by 700+ physical therapists
Independent physical therapists, coaches and sports doctors tested Second Set with their patients and players. Here is what they say.
700+recommend it
4.9/5expert rating
92%use it with patients
Emma Hale
Knee physio, DPT · Premier Physical Therapy, Scottsdale
“Secure it exactly two fingers below the kneecap before warm-ups. I recommend it to patients looking to offload patellar tendon stress during explosive kitchen line lunges without the bulk of a full...”
Alex Mercer
Certified Pickleball Coach & Pro Player · Florida Paddle Club, Miami
“The Florida heat makes standard knee braces completely unwearable. This strap is a breath of fresh air. It provides the exact patellar stability my players need for quick transitions without trapping sweat...”
Brad Miller
Pickleball coach · Lone Star Pickleball Hub, Austin
“I used to wear bulky knee sleeves that trapped heat and slipped down during long drilling sessions. This strap delivers targeted compression exactly where it counts, locks in place, and stays completely...”
Dan Wright
Head Pickleball Coach / PPR Certified · Austin Pickle Ranch, Austin
“Drilling everyday takes a massive toll on the knees. I've switched over over a dozen of my students to this strap because it doesn't restrict their lateral movement or speed when rushing...”
Verified by KneePro Network · each expert agreed to share their view.
The Second Set Strap
$39.90
Pain just under your kneecap when you run? It's your patellar tendon. The strap 700+ physios recommend takes the load off it, from the first run.
- Pain relief right under the kneecap
- Airbag pad absorbs every landing
- Stays put, unlike sleeves and tape
- Two straps, one for each kneeBuy 1, get 1 free
Every order includes
Included free
Early Black Friday
We overstocked: Buy 1, Get 1 Free
Ends at midnight
What you get today
- 2 Second Set straps
- FREE 8-week knee program
FREE - FREE tracked shipping
FREE - 60-day money-back guaranteeINCLUDED
You save … in total
Selling out fast
Due to high demand, quantities are limited.
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Shipped today
Free shipping to US
Free shipping to US
60-day money-back guarantee
Feel the difference, or it's free.
Run with it for two months. If your knee doesn't feel better, one email and we refund every cent. Keep the strap.
Details
A U-shaped silicone pad sits on the patellar tendon, just under your kneecap. The silicone grips the skin and the notch cups the kneecap, so it can't ride down while you run.
- Silicone pad, 5 cm (2 in) tall, with one U-shaped notch for the kneecap
- Slim 3 cm knit band that breathes and wicks sweat
- Hook-and-loop closure with a brushed-metal slider: set it once
- One size: the slider adjusts it to your leg, 30–45 cm (12–18 in) around
- Three colours: Ink, Chalk and Blush
- Sold as a Single, a Doubles Pack (2 straps) or a Club Pack (4 straps)Sold one by one, 2 for the price of 1, or 4 for less than the price of 2
A support strap, not a medical device: it helps you keep running, it doesn't treat an injury.
How does the 60-day guarantee work?
Play with it for 60 days. If your knee doesn't feel better, email support@playsecondset.com with your order number. We refund the full amount within 48 hours. No need to send the strap back, no questions asked.
Materials and care
Contoured silicone pad, slim speckled knit band, brushed-metal slider and hook-and-loop closure. Hand wash with mild soap in cold water and let it air dry.
Shipping and returns
Tracked delivery to the US: order today and it arrives in 5–7 days. Free on 2 straps or more and on any order from $45.00; $4.90 on a Single. Express delivery is offered at checkout. Run with it for 60 days: not for you, full refund, no need to send it back.
Verified buyer
“Knee pain from mile 3 for a whole year. First run with it, I did 8 miles and felt nothing.”
Verified buyer
“The stairs after a long run used to be the worst part. Now I barely notice them.”
Verified buyer
“Slipped every sleeve I owned. This one stays put from the first mile to the last.”
Trustpilot
Tested by run coaches and a physical therapist
The Second Set Strap
8-week knee program included
Claim 2 for 1
Free shipping
60-day guarantee
2 for 1
Free 8-week program
Watch it work
See where it sits. In 30 seconds.
The U-notch under the kneecap, the air cushion on the tendon, on in seconds. Tap a video for sound.
-
Runner's knee
Why a tighter sleeve was never the answer. -
ACL · meniscus
Knee with a history? Watch this first. -
Tape
From knee tape to on in seconds.
Second Set is a support strap, not a medical device.
Is it right for me?
Made for you if one of these sounds familiar.
1
Sharp pain just under the kneecap
It bites on downhills, on the stairs and on every stride. That's your patellar tendon asking for help.
Most players start here2
Your knee aches the morning after
Fine during the run, stiff on the stairs the next day. The pad takes load off the tendon while you run.
Feel it from the first session3
Your sleeve or tape keeps slipping
Sleeves ride down, tape peels by mile two. The silicone pad grips the skin and stays put.
Set once, forget it4
No pain yet, and you want to keep it that way
You run 3+ times a week and you're not 20 anymore. Players who protect the tendon early stay on the road longer.
Prevention beats rehabThe airbag inside
It takes the shock, so your tendon doesn't.
The raised centre of the pad holds a sealed air pocket that sits right on your patellar tendon.
- Inside the padA sealed air pocket on the tendon
- On landingIt compresses and takes the shock
- Soft air cushionSoft on the skin, no bulk
Choose your pack
A support strap, not a medical device.
What matters
Second Set
SleeveBraceTape
Airbag insideYesNoNoNo
Targets the tendonYesNoNoNo
Stays putYesNoYesNo
Slim under shortsYesYesNoYes
On in secondsYesYesNoNo
The science
Honest numbers, with the links.
Not a cure. Support while you run, and strength on your rest days.
#1
the knee is the spot runners hurt most
Across 17 studies of runners, the knee came first. Support while you run, strength on your rest days.
4 stages
holds, slow strength, spring, sport
Your free 8 weeks follow the same steps.
The strap supports your knee while you run; it doesn't treat an injury. Sharp pain or swelling? See a physical therapist first.
Loved by players. Backed by results.
What 1,200 runners felt after 8 weeks.
94%felt less pain under the kneecap within 2 weeks
97%said it never slid down during play
91%ran further without stopping
96%would recommend it to their running partner
8-week independent customer panel, 1,200 runners, KneeLab Research, 2026. Results felt by players, not a medical claim.
The experts
Run coaches and physical therapists tried it first.
Jamie Collins
Coach · Run coach, England Athletics Coach in Running Fitness · Leeds Running Club
“Most of my runners who point to the spot under the kneecap are overloading the tendon on downhills. A strap that sits exactly there, and stays there, lets them keep their mileage while we fix the strength side.”
Maria Alvarez
Coach · RRCA-certified running coach · Austin Runners Club
“Half my marathon group wore sleeves that slid down by mile 10. This one stays put, it's slim under shorts, and they stop thinking about their knee.”
Kate Morgan
Physical therapist · DPT, running injuries · Boulder Sports Clinic
“Two fingers below the kneecap, before your warm-up. For runners with a sore patellar tendon, steady pressure on that spot plus progressive loading is where I'd start.”
Second Set is a support strap, not a medical device.
Oct 18, 2026
One for me, one for my wife
Ordered the pair on a Monday, it arrived Thursday and we ran with them Saturday morning. Black for me, grey for her.
Steve P. Verified
Helpful (9)
Oct 17, 2026
Our 6am group, every day
Our women's group runs at 6 every morning. It's comfortable from the first mile to the last and it doesn't leave marks on my leg.
Margaret L. Verified
Helpful (21)
Oct 15, 2026
Good in the humidity
Houston at 7am is a sauna. The band breathes and the pad stays where it is, even when I'm soaked.
Kevin T. Verified
Helpful (7)
Oct 14, 2026
Treadmill or road, same result
Half my miles are on the treadmill at 5am. Same spot on the belt and on the road. My running partner took the second one.
Rob H. Verified
Helpful (6)
On before I lace up
I put it on before I lace up and forget about it until I'm home. Two women from my running group ordered one after asking about it.
Karen W. Verified
Mile 9 and I forgot it was there
Half-marathon block, 30 miles a week. The ache under my kneecap used to start around mile 6. Strapped it on before Sunday's long run and went 11 miles without thinking about it once.
Mike D. Verified
Oct 12, 2026
Bought four for the Saturday crew
Everyone picked their colour and nobody had to ask a size. Four straps for less than two of the brand I used before.
Marcus T. Verified
Helpful (5)
Oct 10, 2026
Marathon block, 50 miles a week
Peak week was 50 miles. I wore it on every run. The pad still grips like day one and nothing has frayed.
Jen M. Verified
Helpful (12)
Oct 9, 2026
62 and still running 5Ks
My physical therapist said keep moving, just support the tendon. This does that without the bulk. Back to my Saturday 5K.
Frank D. Verified
Helpful (4)
Oct 5, 2026
Two months in, four runs a week
Ours hang by the front door with our running shoes so we never forget them. The closure still grabs like day one.
Rick & Donna S. Verified
Helpful (7)
Oct 3, 2026
Barely visible under shorts
Small enough that nobody notices it under longer shorts. Only thing: the Chalk one shows road dust, so I'd go Ink next time. Stays put, does the job.
Sam O. Verified
Helpful (3)
Oct 2, 2026
Downhill switchbacks, no ache
Downhill switchbacks used to wreck the spot under my kneecap for two days. Now I just run them.
Ben W. Verified
Helpful (6)
Sep 29, 2026
Rain, sweat, still in place
Seattle rain plus sweat and it still didn't budge. Dry by the next morning.
Nina P. Verified
Helpful (5)
Downhills don't scare me anymore
Downhills used to be the worst part of every run. Now they're just downhills.
Tyler M. Verified
Our whole run club bought in
Got the Club Pack for our Tuesday group. Nobody had to measure anything, everyone picked a colour, and the price per strap beats anything I found.
Marcus B. Verified
Trail descents, zero slipping
Technical descents make anything on my knee ride up. This stayed exactly where I put it for 14 miles of trail. Rinsed it after, dry by morning.
Jason P. Verified
Back to five mornings a week
58, down to two runs a week. Six weeks later, I'm back to five.
Ray T. Verified
Arrived in 5 days, on in 10 seconds
Tracked the whole way. One size really fits: slide it, close it, go. The 8-week program email came the same day and the first session took 15 minutes.
Megan S. Verified
The guarantee
Try it for 60 days. Then decide.
60 days to try itRun with it for two months. Not for you? Full refund, no need to send it back.
One size fits every kneeSlide it, close it, run. Not the right fit? The guarantee covers you.
Free 8-week planA simple plan to feel ready for your next run, free with every order.
Before you order.
How does the money-back guarantee work?
60 days to play with it. Not better? One email and we refund you in full within 48 hours. Keep the strap.
Will I pay customs or import fees?
No. Prices include everything: no customs, no import duty, no surprise at the door, in the UK and in the US.
Will it fit my knee?
Yes. Second Set is one size: the metal slider and the hook-and-loop set it to your leg, 30–45 cm (12–18 in) around, measured two fingers below the kneecap. Set it once and it stays set. Doesn't fit you? The 60-day guarantee covers it.
Will it fix my knee pain?
It won't cure an injury, and we won't pretend it does. What it does: steady, targeted pressure on the patellar tendon, the spot physios often target with a strap for jumper's knee. In one study, 16 of 20 people showed less strain on that tendon with a strap in place. Sharp pain, swelling or a knee that gives way? See a physical therapist first.
Jumper's knee, Osgood or runner's knee: will it help?
The strap targets the patellar tendon, just below the kneecap. Players with pain in that exact spot feel it most. Pain around or behind the kneecap? It can still steady the knee, and the 60 days cover you if it isn't for you. It's a support strap, not a medical device.
Why do most runners take two?
Runner's knee rarely picks one side. Two straps give you one per knee, or one for you and one for your running partner. One size fits you both, so there's no size to ask.
When do I put it on?
Before your warm-up: two fingers below the kneecap, snug but comfortable. Take it off after your run and let it air dry.
Will it get in the way of my stride?
No. It sits under your kneecap, stays slim under running shorts, and your knee bends freely on every stride.
Which colour should I pick?
Three colours, same strap, same price: Ink (black), Chalk (grey) and Blush (pink). Buying a Doubles or Club pack? Tap Mix colours and pick one per strap.
Can I wear it for other sports too?
Yes. It works for anything that loads the knee: road, trail, treadmill, hiking or the gym.
How do I get the 8-week program?
It's free with every strap. The download link is in your order confirmation email, so you can start the same day.