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  • La Sportiva - G5 Mountaineering Boot - Black/Yellow
    La Sportiva - G5 Mountaineering Boot - Sole
    La Sportiva - G5 Mountaineering Boot - 3/4 Front
  • La Sportiva - G5 Mountaineering Boot - Black/Yellow
  • La Sportiva - G5 Mountaineering Boot - Sole
  • La Sportiva - G5 Mountaineering Boot - 3/4 Front
La Sportiva - G5 Mountaineering BootView Larger Image

La Sportiva G5 Mountaineering Boot

25% Off
$562.50 $750.00

Item #LSP00CV

Select options
  • 40.5
  • 41.0
  • 41.5
  • 42.0
  • 42.5
  • 43.0
  • 43.5
  • 44.0
  • 44.5
  • 45.0
  • 45.5
  • 46.0
  • 46.5
  • 47.5

Tech Specs

Upper Material:
[gaiter] Cordura, rubber [upper] high-tenacity nylon, PE barrier
[gaiter] membrane
[upper] felt
[gaiter] heat-sealed zipper [upper] Boa
honeycomb tech insulated carbon (3mm)
TPU, PU, SBR Aircushion (8-9mm)
Vibram Matterhorn, Impact Brake System
super-gaiter boot
Crampon Compatibility:
Claimed Weight:
1lb 14oz
Recommended Use:
Manufacturer Warranty:
1 year

It looks like it'll go.

Those were the words your buddy told you before you set your sights for an epic first ascent, and you can rely on the La Sportiva Men's G5 Mountaineering Boot when you're ascending unknown terrain. This highly technical big mountain boot boasts a stretchy Cordura gaiter equipped with a waterproof membrane and a heat-sealed zipper to keep wetness at bay. The durable upper features flex zones to keep you trekking and climbing anatomically, while the insulated felt works with the insulated footbed to maintain warmth. Vibram's Matterhorn rubber sole includes large lugs and step-in crampon compatibility.

  • Technical big mountain boot designed for visionary ascents
  • Stretchy Cordura gaiter with waterproof membrane and rubber rand
  • High-tenacity upper with flex zones and insulated felt
  • Insulated carbon footbed with air cushioned midsole underneath
  • Vibram Matterhorn with large rubber lugs and Impact Brake System
  • Reviews
  • Q & A

Sizing info

    Awesome boots. I saw a deal I couldn't pass up and have these as my first pair of ice climbing boots (poser I know). But ive been out a handful of times and glad I spent the extra $$$. It was super hard to size them because I couldn't try them on locally. Here is some reference on how I sized them.

    I own the following La Sportiva shoes and sizes:

    TC Pros: 43.5
    Miura VS (velcro) 43.5
    Miura (Lace): 44
    Helios 2.0 (running shoes) 45

    As you can see, I own many pairs of LS shoes in different sizes, obviously looking for a different fit between their applications with some. Ultimately
    I bought these G5's in 44.5 and they fit PERFECT. I am generally a US 10.5 and 28.5 mondo ski boot. So it looks if you have your Mondo sizing and use LS sizing chart above, you should be GTG.

    Hope this helps,

    Happy climbing.

    Perfect Alpine and Ice Climbing Boot

    • Familiarity: I've put it through the wringer
    • Fit: True to size

    I think the Sportiva G5 is the perfect boot for the types of climbing I do: frozen waterfalls in CO and Montana and extended trips to Peru and Bolivia. Long approaches are a breeze, they climb flawlessly, crampons go on easily and stay put, and they are really light and warm. Get them- you won’t be disappointed!

    In my opinion, the bad reviews for not being completely waterproof are overstated. I don’t know if you can walk through rivers or whatever, but I’ve used these in countless wet situations from dripping wet frozen waterfalls, walking through deep slush, slipping while trying to cross a stream, to punching through a not quite frozen lake up to my shin without issue. To each their own. Peace.

    Warm and Cozy

    • Familiarity: I've used it several times
    • Fit: True to size

    Mostly used this for roadside and alpine ice in Ouray and the Cascades, where it has performed very well.
    It seems like the most negative reviews are about not being waterproof, which is fair. I simply haven't needed to wade across many streams.

    Born Ready for Winter

    Check out La Sportiva's look into the G5 mountaineering boot.

    Boa system is amazing but...

    • Familiarity: I've used it several times
    • Fit: True to size
    • Size Bought: 46

    The heel lock down for climbing and release for belaying is amazing. Huge upgrade over batura 2.0 in that regard. But like others say, if you are not dealing with frozen terrain, they leak. But I'm a roadside cragger in cold temps so they are the best ice boots I've used. Anything involving slush, stream crossing they are a no-go.

    Is it really true that this boot isn't waterproof? The company claims it's waterproof. Any more details on this? I do a lot of spring climbing in Colorado, where conditions are quite slushy. Thanks in advance.

    @hamid here are some more details linked in response to your question on waterproofing:
    1. https://rockrun.world/blogs/product-reviews/la-sportiva-g5-mountaineering-boot-review
    2. https://runrepeat.com/la-sportiva-g5

    Not waterproof

      I was surprised to see that those boots are NOT waterproof, water comes in through zippers.

      The best!

      • Familiarity: I've used it several times
      • Fit: True to size
      • Size Bought: 44

      I LOVE these boots. Upgraded from the Nepal Evo GTX and they are so much better imo. Very comfortable, light, warm and the climbing performance is awesome. The Boa lacing system is pretty slick too.

      The best!

      Nice! Did you size it the same as your Nepal Evo?

      Not waterproof??

      • Familiarity: I returned this product before using it
      • Fit: True to size

      So I saw some reviews on the La Sportiva website stating that this boot is not waterproof. I got them myself to take a look, and these boots are really sweet. BUT THEY ARE NOT WATERPROOF. There is a direct path for water to enter the inside of the boot. The zipper is not waterproof, and the inner boot has no gusset or tongue (it's an open half-boot style). Thus, if you step in a puddle, saturated slush, river, or anything else, there is an clear path from cold water to your foot. I was pretty shocked by this, so I talked to the La Sportiva folks. After reviewing my comments, they are now updating the description of this boot to not waterproof but instead "highly water resistant." To be sure, if all I did was roll up to roadside crags and climb in super cold temps, these things would be a dream. But the risk of water logged feet for any alpinism seems a very high cost. How often do you cross a river, get slogged in a bog, or find yourself working through slush? I am disappointed.

      Do everything, stay warm, be agile.

      • Familiarity: I've used it several times
      • Fit: True to size

      These are the last pair of mountaineering boots i will ever wear (well, until they make a new version of this) - super light, agile, extremely warm, and great for every application from ice climbing to casual ridge walking.

      They are essentially the same weight as the Phantom Tech but seem to climb a bit more natural, and fit my feet a bit better.

      An easy decision for any mountaineering, especially if you think you'll be climbing in colder temps.

      La Sportiva

      Adult Footwear
      4 35.5 5  
      4.5 36 5.5  
      4.5+ 36.5 5.5+  
      5 37 6  
      5.5 37.5 6.5  
      6 38 7  
      6.5 38.5 7.5 24
      6.5+ 39 7.5+ 24.5
      7 39.5 8  
      7.5 40 8.5 25
      8 40.5 9 25.5
      8.5 41 9.5 26
      8.5+ 41.5 9.5+  
      9 42 10 26.5
      9.5 42.5 10.5 27
      10 43 11 27.5
      10.5 43.5 11.5  
      10.5+ 44 11.5+ 28
      11 44.5 12 28.5
      11.5 45 12.5 29
      12 45.5 13 29.5
      12.5 46 13.5 30
      12.5+ 46.5 13.5+  
      13 47 14 30.5
      13.5 47.5   31
      14 48   
      15 49   
      Note: La Sportiva shoes are built on European half sizes which are smaller increments than US half sizes. This gives us four extra sizes per size run which gives you a better fit!