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La Sportiva Aequilibrium ST GTX

Colour: Black/Yellow
Size: EU 40

The La Sportiva Aequilibrium ST GTX is a lightweight synthetic mountain boot, compatible with semi automatic crampons. It has been designed for alpine walking, trekking, glacier crossings and other mixed terrain, plus scrambling and via ferrata.

One of the defining features of the Aequilibrium is the Double Heel™ combined with the existing La Sportiva Impact Brake System. The Impact Brake System is very common amongst La Sportiva footwear. To summarise the sole has specific shaped angular lugs that have extra surface area to act as a brake whilst ascending or descending, whilst retaining plenty of rubber for impact protection. The Double Heel™ is added to this setup to provide even more braking than normal when walking downhill, plus the back lug is angled to provide a rolling motion when stepping down heel first.

The boot feels great when put on. Your ankles feel very well supported and cushioned. Combined with the 3D Flex System Evo™ directional joint you still have plenty of movement in the ankle area whilst retaining all the support which ultimately gives great confidence with the control and support offered. Also of note is what feels like a more open and softer stretch area high up on the back of the boot to give more give when walking and less pressure on the back of your ankle and achilles.

The construction of the boot is from lightweight, yet still durable materials, particularly the TPU shell around the toe and heel to protect against the sharp rocks and the like.

Overall the La Sportiva Aequilibrium ST GTX is a very impressive boot that is comfortable to wear with some great new technology that reduces muscle fatigue and provides great comfort and support.


If you require some help with sizing this boot view our Mountaineering Boot Sizing Guide


A short video from La Sportiva highlighting the features of the La Sportiva Aequilibrium ST GTX.

Relevant Article

For more information on choosing the right mountain boots and fitting the correct crampons read our Rock + Run article: A Guide to Mountain Boots and Crampons


  • Snow guard in soft fabric
  • Gusseted tongue for maximum wearing comfort
  • Ergonomic, enveloping and precise shape with TPU shells integrated in the toe and heel to reinforce the uppers
  • 3D Flex System Evo™ directional joint with shaped ankle and protected by an anti-abrasion TPU layer: allows better control of the support and perfect mobility of the ankle
  • Uppers in HoneyComb Guard™ fabric with mono-burr wire reinforcements and TPU anti-abrasion film for protection and enhanced lightweight
  • Hook fastening at the top, webbing at the bottom with lower anti-chafing gaiter for use with crampons
  • Semi-crampon midsole compatible with semi-automatic crampons in case of ice or snow


  • Crampon Compatibility: B2
  • Single/Double: Single
  • Midsole: None
  • Uppers: Water-repellent high-tenacity Nylon 60.6 with abrasion resistant zones Honey Comb Guard
  • Lining: Gore-Tex Performance Comfort
  • Sole: Vibram® SpringLug Tech rubber and PU foam inner lining
  • Weight: 630g (1/2 pair)


    Mountaineering / Via Ferrata / Trekking / Glaciers and mixed terrain

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    Customer Reviews

    Based on 12 reviews
    Rebecca Gentek
    Great B2 boots

    I usually walk/hike in trail running shoes, so I am not used to boots. These feel very light and their fit is snug. I went up half a size.

    stephen giles

    Brilliant boots so comfortable and crampons fit well. No foot fatigue after 10 miles, certainly recommend them 👍

    Daniel K.
    So good I bought a 2nd pair

    incredible to hike in. Don’t feel like my feet overheat. Sturdy, good for approaches. I’ve bought a few other notable brands at this price point and they don’t compare sorry to say

    So good I bought a 2nd pair

    incredible to hike in. Don’t feel like my feet overheat. Sturdy, good for approaches. I’ve bought a few other notable brands at this price point and they don’t compare sorry to say

    Superb - but size up!

    I have found that the Aequilibrium ST's have come up a little small, additionally, these are low volume boots. I take a size 48 so there was no option for me to size up. I am only able to wear medium thickness socks with these boots - no chance of thicker socks or liners (I will wear heated socks in winter, as needed). Also, I am not able to swap out the standard footbed with Superfeet insoles (or similar) as the extra volume becomes a problem. However, the boots are keepers as they are otherwise superb - for such lightweight boots, comfort under foot is amazingly plush (I have early onset osteoarthritis in my feet, so this is a key feature for me). Finally, the heal brake is a game changer, all boots need this feature.