Marcus's alarm goes off at 4:30 every morning. Four days a week, for nine years.

I usually sleep right through it.

That Monday, I woke up because the bed moved, and then he didn't get up.

He was sitting on the edge of the mattress in the dark. I heard him take a breath like he was about to lift something heavy.

Then he stood up, and his leg folded.

He didn't fall. He caught himself on the dresser. And then, very quietly so he wouldn't wake me, he got down on his hands and knees and crawled to the bathroom.

I lay there and pretended I was.

I don't know why. I think I didn't want him to know I'd seen it.

Twenty minutes later, I heard him lace his boots in the kitchen. Then the truck started. He went in.

My husband crawled to the bathroom at 4:30 in the morning. Then he put on his steel toes and went and worked a 10-hour shift on concrete.

That night, when he got home, I asked him how his feet were.

"I'm fine."

That's what he always says. "I'm fine."

He's 41. He played ball in high school. He's the strongest man I know.

And I had just watched him crawl across our bedroom floor.

Marcus works four tens at a distribution center. Steel toes, sealed concrete, about 10 miles a shift. Saturday overtime when they need people, and they always need people.

He doesn't complain. He never has. His dad worked the same kind of job and never complained either.

So I learned to read him instead.

He'd sit in the truck after he parked. Five minutes. Ten minutes. Just sitting there.

The first time, I thought he was on the phone. He wasn't.

Then he'd come in, and the boots came off at the front door before he even said hi. He'd walk to the couch on the outsides of his feet, like the floor was hot.

Feet up. Eyes closed. "I'm fine."

On Thursdays, he was short with everybody. Not mean. Just done.

He knew it, too. I'd hear him apologize to the kids at bedtime.

I asked him once if it was his feet. He said, "It's just the job. Everybody's feet hurt."

The worst part was that he believed it.

A guy on his dock has been there 15 years and says foot pain is just part of the job. Marcus says the same thing. They all do.

Here's what nobody tells you about a husband with bad feet. It doesn't stay in his feet. It gets into the whole house.

Our daughter Sofia is nine. She used to wait by the door when his truck pulled in so he could swing her around.

At some point, she stopped waiting.

I didn't notice when. I just noticed one day that she wasn't there anymore.

Our son Mateo is six. He asks his dad to play catch every single night.

"Not tonight, buddy. Saturday."

And on Saturday, Marcus's feet were up on the ottoman, because Saturday was for recovering from the week.

Sunday was for dreading Monday.

We used to walk to the park after dinner. We used to go to the county fair every summer. We used to do a lot of things.

Now I'd say, "Want to go for a walk?" and he'd look at me like I'd asked him to run a marathon.

I'm not proud of this, but for a while I was angry at him. I thought he'd just stopped trying.

Then I watched him crawl to the bathroom, and I felt sick about every time I'd rolled my eyes.

He hadn't stopped trying. He was using everything he had to get through ten hours. There just wasn't anything left over for us.

So I tried to fix it. That's what I do.

The night after the crawl, I typed what he had into YouTube. The hot wire feeling in his heel. Can't put weight on it first thing in the morning. Feels like walking on gravel by the end of a shift.

I found a stretching video with millions of views. Everyone in the comments said it worked in two minutes.

I thought, I'll get him to try it as soon as he comes home.

He did the stretch twice. Nothing.

I bought the stretching sock you wear to bed. He wore it two nights and took it off because he couldn't sleep.

I froze water bottles for him to roll his feet on. I filled the big mixing bowl with hot water and Epsom salt. I rubbed his feet during TV until my hands cramped.

It helped. For that night.

Then 4:30 came again.

Marcus had his own theories. He'd say them like he was trying to talk himself into something.

"It's these boots." So last spring he bought new ones. Good ones, $220 from a real boot store. They felt great in the store. By Wednesday he was limping again.

"It's my weight." He's a big man. He's always been a big man. His feet didn't hurt like this ten years ago at the same weight.

"I'm just getting old." He's 41.

After a while, we stopped talking about it.

I think we both decided, without ever saying it, that we'd just have to live with it.

That scared me more than anything.

His job runs on attendance points. He'd called in for his feet twice that year, and he'd never called in for anything but the flu. One more and he'd be on a final warning. We have a mortgage, two kids, and he's the one with the insurance.

I read about a man online who quit his job because of hours on a cement floor in horrible pain. Another one, a construction worker, said he was on the verge of quitting the trade altogether because of his feet.

I lay awake doing math I didn't want to do.

He's 41. He's got 25 more years of this, at least.

If his feet were giving out now, what was he going to do?

The answer came from somewhere I'd never have looked.

In June, we went to a cookout at Hector's. Hector works on Marcus's dock. He's 52, and he's been on that concrete longer than Marcus has.

Marcus sat in a lawn chair the whole afternoon.

Hector was the one manning the grill, standing for three hours straight. Then he got up a game of horseshoes with the kids.

I couldn't stop watching him walk.

I finally asked him. I didn't even know how to say it.

"How are you still walking like that? Marcus can barely get out of the truck."

Hector put the spatula down and looked over at Marcus in the lawn chair. He didn't laugh.

"I was him two years ago," he said. "Tell him to pull the insole out of his boots tonight and hold it up to a light. Then call me."

Marcus fell asleep on the couch that night before nine.

His boots were by the front door where he'd kicked them off.

I sat down on the floor next to them, untied one, and pulled the insole out.

It was as thin as a mouse pad. I held it up to the hallway light and I could almost see through it.

That's what he'd been standing on. Ten hours a day, four days a week, for nine years.

I called Hector the next morning.

Here's what he told me, and what I read until 1am that night.

Work boots are built to protect the toes. The steel cap, the tough sole, the grip. That's what the safety rules care about.

The insole on top is basically a cover sheet. Thin. Flat. An afterthought.

That's why the new boots felt great in the store. Twenty steps on carpet, and anything feels good.

But Marcus doesn't take twenty steps. He takes about 24,000 steps a shift on sealed concrete.

One step on a thin liner doesn't hurt.

24,000 of them do.

It wasn't his boots. The boots were doing their job. They protected his toes.

It wasn't his weight. Hector's a big man too.

It wasn't his age. Hector's 52.

It was what he was standing on inside the boots.

Then I thought about the insoles I'd seen at the pharmacy. They're all soft. That's the whole selling point.

But soft foam squishes under a grown man's weight. One soft layer, trying to cushion his heel, hold up his arch and keep his foot steady for ten hours, all at once.

It can't do all three. So it ends up doing none of them well.

Hector said that's why he'd given up on store insoles years ago.

Then he texted me a picture of what's in his boots now.

They were called Naprelle Cloud Insoles. And the first thing I noticed was that they weren't one layer.

They were three layers, and each one has its own job.

On top, there's a side arch support that holds the arch up instead of letting it collapse after hours on concrete.

In the middle, there's an enclosed honeycomb gel layer that takes the hit every time the heel comes down.

And on the bottom, there's a memory foam base with a deep U-shaped heel cup that cradles the heel, so it stays centered instead of sliding around in the boot.

Then I saw this line:

In Naprelle's in-house test, the full insole absorbed 56% more shock than a regular flat stock insole.

A regular flat stock insole. The same mouse pad I'd held up to the hallway light.

And here's the part that mattered most for a man like Marcus. He didn't have to buy new boots, go see anybody, or admit anything was wrong. They go inside the boots he already wears. You take the factory insole out and put these in its place.

You trim them to fit along the size lines. I checked the size on the tag inside his boot, ordered that night, and traced his old insole at the kitchen table when they came.

They cost less than the boots he'd bought in the spring.

They came on a Friday. Sunday night, after he fell asleep on the couch, I put them in his work boots by the front door.

I didn't say anything. I was afraid if I made it a big deal, he'd say he was fine.

Monday, he sat in the truck when he got home. Same as always.

My heart sank a little.

Tuesday, he came straight in.

Wednesday, he had his boots on through dinner. I don't think he even noticed.

Thursday, I heard the truck at 5:35. I went to the window like I always do.

He got out, walked up the driveway with his lunch cooler in one hand, and Sofia came flying out the door.

He picked her up and swung her around.

Boots on.

That night at dinner he looked at me across the table.

"Did you do something to my boots?"

I told him about Hector, and the insole, and the hallway light.

He didn't say anything for a long time. Then he said, "Hector, huh." And he went out back and played catch with Mateo until it got dark.

The next Monday, his alarm went off at 4:30.

He stood up, walked to the bathroom, and closed the door.

That was it. That was the whole thing. I cried into my pillow anyway.

He still works four tens on concrete. That didn't change.

What's under his feet did.

A few weeks later, I ordered the bundle.

Here's why. Marcus rotates two pairs of work boots so one can dry out. He keeps an old pair in the truck for overtime. And his weekend sneakers had the same thin liner as everything else.

That's four.

The fifth pair went to my brother. He drives a delivery truck and is on his feet all day. He'd never buy them for himself either.

My advice: If your husband sits in the truck before he comes in, or takes his boots off before he says hello, don't wait for him to say something. He won't. Pull the insole out of his boots tonight and hold it up to a light. Then put three layers in its place, in every pair he works in.

Here's how it compares to everything we tried.

What buyers are saying, from the Naprelle product page:

Individual experiences vary.

Naprelle Cloud Insoles

Side arch support, enclosed honeycomb gel and a memory foam base with a U-shaped heel cup.

Men's 5 to 15. Women's 6 to 16. Trim to fit.

Buy 3 Get 2 Free: 5 pairs, $15.99 a pair. BEST VALUE

Buy 2 Get 1 Free: 3 pairs, $19.99 a pair, free shipping.

Single pair: $30.

Try them for 90 days. Let him work his shifts in them. If they're not for him, you're covered by Naprelle's 90-day guarantee.

Last month, Hector's wife called me.

A new guy on the dock, 23, with a baby at home. Already sitting in his car at lunch with his boots off.

"Your turn," she said.

I went over to his wife's place with a pair in a gift bag and a sticky note that said, "Hold his old ones up to a light."

He'd never have bought them for himself.

Most of them won't.