How to stretch La Sportiva Miura?

I just bought a new pair of Miuras. The right shoe fits perfectly, but the left one is causing a lot of pain in my pinky toe. After just three routes, I have to stop completely.

Now I'm wondering how I can stretch the shoe a bit more quickly. I read online that you can put them in the freezer or even take a hot shower with them on. Some people also mention using leather stretching spray, but I’m not sure if the Miuras can handle that.

Have any of you tried something that worked? Thanks a lot!

I’ll wear my new shoes while I’m watching tv and walk around the house in them a bit. I don’t think any techniques other than patience are helpful.

Carefully

Hot shower and keep them on your feet as long as possible afterwards. Then stuff them full of newspaper.

Put them in the oven at 200 for 5 min, then walk around in them until they cool off. Repeat a few times until they feel nice & broken in at room temp. Been doing this for years and never had any de-lamination or other issues - just be sure to set an alarm! 

I’ve done the shower trick. I found that if you climb in them while still wet, they really conform.

That said, Miura’s are a pretty decent quality shoe. I’ve done it on undersized slippers and weird shit like Reebok’s. I can’t say I’ve done it with a good shoe. 

Shoe stretchers are nice for spot stretching - they typically have detachable bumps that can target specific areas.

You can try putting the shoes in the freezer with a ziplock bag filled with water to stretch them out as the water expands. Alternatively, wearing thick socks with the shoes and walking around might help loosen them up gradually. If they're leather, a leather stretching spray could work, but test it on a small area first to be safe. A shoe stretcher or taking them to a cobbler are also options. Avoid the hot shower method, as heat can damage the materials. 

Christian Rock wrote:

Avoid the hot shower method, as heat can damage the materials. 

Sitting on the seat of a car in the summer, sure. Boiling? Yep. A heat gun? Why not.

But a shower? I think the most that you could tolerate for more than a second or two is only 10 degrees warmer than your body temperature. I think most showers are 2-3 degrees warmer than your body. No glue worth using would delam at such low temps.

I don’t make a practice of climbing in the sun on 100 degrees days but I’ve done it (and hated it). My shoes were extra sweaty but held together fine. If you can handle it, I’m sure that would break them in too, if you survive.

It’s not so much that it’s bad advice, just given at the wrong temperature range.

Another vote for the shower method. The combo of water + heat is very effective for leather climbing shoes. It won't damage the shoes; we're just talking about a warm shower here, not a vat of boiling oil.

Afterwards, dry them by putting them in front of a fan overnight. No need to stuff them with newspaper; circulating air works better.

Eye of Newt and Wing of Bat gits ur dun.