The night before a long run, I lay everything out on the living room floor in the order I'll put it on. Deso jokes that it looks like a small archaeological dig — socks here, knee sleeve there, vest, flasks, gels, jacket, buff, headlamp if it's early. The kids step around it on their way to breakfast.
This isn't superstition. It's the only honest way I've found to avoid the mid-run "I knew I forgot something" panic at kilometre 14 when the wind picks up and you realise the gloves are still on the kitchen table. Twenty kilometres is the threshold where small gear decisions stop being cosmetic and start deciding whether you finish your run feeling strong or limping home with hot spots, a stiff knee and a sour mood.
I've been an ultra runner for a long time and a physiotherapist longer. What follows is the actual list I work through — what I wear, what I carry, and why each piece earns its space. I'll be honest about what matters and what's marketing noise.
Why 20K is the Honest Threshold
Anything under about 20 kilometres, you can mostly get away with whatever's clean. Your feet don't have time to swell properly, your glycogen isn't seriously depleted, and minor friction points stay minor. Past that mark, three things start happening to the body that change what you need from gear.
First, your feet swell. Capillaries dilate, fluid shifts, and the snug shoe you started in becomes either a comfortable fit or — if you sized too tight — a blister factory. Toes need room to splay as you fatigue.
Second, form degrades. I've written about this before in why your running form falls apart at mile 18. The glutes get lazy, the pelvis drops a little more on each step, the knees track slightly more inward, and the calves take on work they weren't built to handle. This is when knee pain and Achilles niggles love to show up.
Third, circulation gets sluggish in the lower legs. Blood pools, lactate clears more slowly, and the next day's "heavy legs" feeling is born in the last 40 minutes of today's run.
Gear can't fix bad training. But the right gear protects your good training from being undone by avoidable irritations.
The Order I Put Things On
I dress feet-up, because every layer below influences the one above. If your socks bunch, the shoes won't help. If your shoes don't fit, the knee support won't save you.
Layer 1: Socks That Don't Shred Your Feet at Hour Three
Socks are the most underrated piece of long-run gear, full stop. Cotton is out — it holds moisture, balls up at the heel, and creates blisters that will end your day at kilometre 25.
What I look for: a fitted heel cup, a seamless or low-profile toe seam, fibre blends that wick (merino blends are excellent for cold and shoulder seasons), and enough structure through the arch that the sock stays put for four hours. If your sock migrates down your heel by kilometre 8, the friction is already starting.
Two-sock systems work for some runners — a thin liner under a heavier sock to absorb shear. I don't bother in summer, but on a wet winter long run I sometimes do.
Layer 2: Shoes That Match the Surface and Your Foot
I rotate between a more cushioned shoe for road sections and grippier trail shoes for the mountain routes around home. The single biggest mistake I see in runners coming back to long distances after a setback (something I covered in restarting training after a setback) is wearing a shoe with too narrow a toe box for 20+ kilometre efforts. Your toes need to splay.
Half a size up from your street shoe is a reasonable starting point for any run over 25 kilometres in warm weather.
Layer 3: Insole — The Quiet Workhorse
If your shoe's stock insole feels like a thin slice of cardboard, replace it. A supportive insole keeps the arch from collapsing as fatigue sets in, protects the plantar fascia, and helps the knee track better because the foot underneath is doing its job. This is where the HYKLE Impact Pro lives in my rotation — I use them in my daily trainers and rotate them between shoes for the runs where I know I'll be on my feet for three or four hours. The dual-phase correction structure gives me arch support without that "fake plastic shelf" feeling cheap insoles have.
For context on why arch support matters past 20K, I'd point you to the 7 most common plantar fasciitis mistakes — most of them are gear and load decisions that quietly accumulate over long runs.
Layer 4: Knee Support — Only When the Route Demands It
I don't wear a knee sleeve every run. I'd rather train the supporting muscles than rely on the brace. But for downhill-heavy routes — and around our home in the Balkans, almost every interesting route is downhill-heavy somewhere — I reach for a knee sleeve before I leave the house, not after the pain starts.
A good compression sleeve does three things: it gives proprioceptive feedback so your brain "knows where your knee is" as fatigue blunts that sense, it provides mild support to the patellar tendon and surrounding soft tissue, and the warmth keeps tissue compliant. I cover this in more depth in how I manage knee pain between back-to-back ultras.
Layer 5: Compression Socks for the Long Sessions
Not for performance during the run — the evidence there is mixed — but for circulation on back-to-back long weekends, calf support on rolling terrain, and recovery afterward. When I'm in a heavy training block with a 25K Saturday followed by a 30K Sunday, compression socks are non-negotiable for the second day and for the evening of recovery between.
Layer 6: Layers, Buff, Hat, Gloves
A wind shell weighs almost nothing and saves a run when the weather turns. A buff doubles as a hat, ear warmer, neck gaiter and emergency tissue. Gloves go in even when it feels warm at the door — at altitude or after sundown, you'll want them.
Carry: Vest, Flasks, Fuel
For anything over 20K I run with a vest, two soft flasks, and fuel. Hydration depends on temperature, but a rough rule: 400–500 ml per hour in moderate heat, more if humidity is high.
Fuel: 40–60 grams of carbohydrate per hour past the first hour. I mix gels, real food (a few dates, a small piece of energy bar), and a sports drink in one flask. The "real food" matters psychologically as much as physiologically on a four-hour run.
Other essentials I rotate in: anti-chafe stick (apply before you leave — between thighs, under sports bra, around the back of the heel), a small first-aid square with tape and a blister patch, phone, ID, and a tiny amount of cash. On any route where I can't easily walk home, a headlamp.
Chafe Prevention — The Detail That Saves Long Runs
Chafe is the silent run-killer. It doesn't hurt at kilometre 5. By kilometre 22 it's all you can think about. Apply anti-chafe balm generously on every potential friction point before you leave: inner thighs, sports bra band, under the arms, top of the foot where the shoe tongue sits, back of the neck if you're wearing a vest, and around the toes if you're prone to interdigital blisters.
Reapply on long efforts. Carry a small tube.
How HYKLE Products Fit Into My Long-Run Kit
Here's the honest version of what I trust on my own runs over 20K. These are the three pieces I genuinely use — not a catalogue dump.
Insoles — HYKLE Impact Pro. These live in my long-run trainers. They give me arch support that holds up past the three-hour mark, which is when stock insoles usually start to feel flat and dead under the foot. Jeffrey Blais, who walks 10+ miles on productive workweeks, put it well in his review: "They help to keep my posture aligned & less stress on my legs." That's the feeling — less stress per step, accumulated over thousands of steps.
Knee support — HYKLE Octo Knee Brace or HYKLE Infinity Knee Brace. I reach for these on downhill-heavy routes and during heavy training weeks when I want extra proprioceptive support without a bulky medical brace. The Octo with its adjustable straps is what I use when I want to fine-tune the compression mid-run. The Infinity is my pick for a sleeker fit under tights in cooler weather. Aria's review of the Infinity captures the appeal: "Super supportive and really help reduce his pain… not bulky under pants or leggings like other braces I've tried."
Compression — HYKLE Compression Socks. I wear these the evening after a long run and on the second day of back-to-back long sessions. The graduated compression genuinely helps how my legs feel the next morning. For travel days to races or training camps, I switch to the HYKLE Compression Stockings with Zipper — easier to get on in a cramped airplane seat, and they cover more of the calf for long flights. If you fly to races, my piece on what 10+ hours in a plane does to your body is worth a read.
For shorter recovery walks or warm-weather days when knee-high feels too much, the HYKLE Ankle Compression Socks are what I throw on with sandals around the house.
A small caveat: nothing here replaces the strength work. I'd rather you build foot, calf, and glute strength first — the foot and ankle strengthening routine is where to start — and use gear as a complement, not a crutch.
Practical: How I Actually Pack and Use This
Night before:
- Lay everything out in the order you'll put it on
- Charge headlamp and watch
- Mix fuel into one flask, fill the other with water
- Anti-chafe stick by the door
Morning of:
- Anti-chafe applied generously before any clothing goes on
- Socks, then check seams sit flat
- Insoles already in shoes; double-knot the laces
- Knee sleeve last on the lower body — easier to adjust over tights
- Vest with flasks already filled
- Pocket check: phone, ID, small cash, gels, spare anti-chafe, tape square
After the run:
- Compression socks within 30 minutes if it was over 25K
- Eat within an hour — protein and carbs
- Elevate legs for 10 minutes while you scroll your phone
- The next day, an easy walk in compression beats lying still
A few of my callanetics students who've started running have told me the post-run compression habit is the single change that made their back-to-back weekend long runs feel sustainable. It's not glamorous. It works.
One Honest Anecdote
Last autumn I went out for a 28K route I knew well. I'd been lazy the night before and grabbed socks from the drawer without checking. They were a thinner pair than I usually wear for that distance. By kilometre 18 I had a hot spot on the ball of my right foot. By 22 it was a blister. By 25 I was running on the outside edge of my foot and my left knee was complaining because my gait had gone sideways.
I finished. I was annoyed. The next morning my knee was sore in a way it never gets on a properly-packed long run. The fix wasn't a fancier brace or a different shoe. It was the boring discipline of laying out the right socks the night before.
Long-run gear isn't about gadgets. It's about removing every small friction so your training can do its job.
Closing — What I'd Tell a Runner Building Their First Long-Run Kit
Start with the feet and work up. Get socks that don't move. Put a real insole in your trainers. Add knee support only if the route demands it or your training history asks for it. Use compression for recovery, not for ego. Apply anti-chafe before you need it.
If you're building your long-run kit and want a starting point, the three HYKLE pieces I lean on are the HYKLE Impact Pro insoles, the HYKLE Octo Knee Brace for downhill days, and the HYKLE Compression Socks for recovery. Everything HYKLE sells comes with the 90-day test and return guarantee, so you can put them through real training before you decide. Lay your kit out tonight. See you out there.