Sirius Lace


(10 customer reviews)


Precise and aggressive – the Sirius Lace is the shoe for your most demanding projects! Equally at home in the gym or outside these shoes excel on vertical and steep overhung terrain where every last fraction of friction helps to propel you up. A full RS rubber sole and medium stiffness midsole provide the perfect combination of sensitivity and friction. The offset lacing system allows you to dial in the perfect fit and provides extra surface area for toe hooks without sacrificing fit or function. Your climbing partners will swear that you’re cheating with these shoes!

  • 3.5mm RS rubber
  • Medium stiffness midsole
  • Lined synthetic upper
SKU: 3240 Categories: ,

Additional information

Weight 23.15 oz
Dimensions 12.5 × 5.8 × 3.7 in


Shoe Type


Rubber Click here to learn more about UP rubber
International Sizing Click here to compare shoe sizes by international market

10 reviews for Sirius Lace

  1. Aron Back

    The Sirius Lace fits true to your street shoe size, they fit perfectly right out of the box, no adjustment period needed. If you’re looking for more high-end performance then comfort, I personally would recommend going a half size smaller, but no more. The craftsmanship is high quality, including re-enforced lace wholes and pull-on tabs. The rubber is soft but firm. Great for edging on a dime, steep terrain as well as vertical and slab and the heel hooks like a champ. Great for hard bouldering and sport climbing. They are a very versatile shoe, also a great choice for indoor and competition climbing.

    • Sang Lee

      Hi Aron,

      Thanks and we missed to reply on your feedback. what shoes are you climbing next? UP is working on Sirius Slipper for next season. Will update when it is ready.

  2. bankheadblake (verified owner)

    As said before the fit of these shoes was perfect the moment i put them on. I have had these shoes for close to a month now and i have to say, the asymmetrical lacing made the fit of this shoe a dream. That combined with the reinforcement on the lacing holes made this shoe an absolute work horse! The rubber itself is as good as it comes, able to out smear and edge a majority of the other shoes i have tried. And also bravo on adding a low volume version for the selection as well.

  3. Jack

    The Serious is great shoe! The fit is excellent right out of the box. I got my street shoe size and they work great for extended wear at the gym. I have a lower volume foot so for a “performance fit” I’d go a half size down. The diagonal lacing is great as it tensions the shoe well but also allows for more rubber over the toe for hooking. The rubber is super sticky and hooks up well on edges but also smears well for a down turned shoe. It’s a winner!

  4. Matt Murphy (verified owner)

    Great shoes. Pretty comfortable right out of the box, I went with the same size as my highangles. Much softer than I anticipated however, these are by far the softest shoes I have ever owned. Not a negative, I was just expecting a shoe with a little more stiffness. Edging hurts the toes a bit. That said I love the design and the fit and the rubber is super sticky.

  5. Gregory Idler (verified owner)

    Shoes are great; going to buy my second pair a little bigger than the ones I wear now. The inside lining ripped on my left and right shoe where the reinforced pull tabs are. I want to see if a half size will make it so I don’t actually have to break the shoe to break it in.

  6. Steven bouzas (verified owner)

    I am very happy with my Sirius lace ups. The shoes fit like a dream. No space in the heal, they have a great edge, and the rubber is super sticky. Also UPS customer service is awesome!

  7. Alan

    Bought these in the same size as five ten dragons (size 10) based on recommendations given to me by a rep, and was a little disappointed they turned out to be about half a size too big. The rest of the review will be based on my experience with this specific pair of shoes I suspect is a little big. I was missing the heel tension I expect from a high end bouldering shoe, and the heel often felt insecure because of this. In addition, the missing tension also seems to affect the overall stiffness of the shoe, making it feel a bit softer than I feel is necessary. On the other hand, the lacing system seems to work really well, I could really dial down the fit with the laces. It’s a bit cumbersome but worth the effort. Rubber seems good as well.

  8. Don Hampton

    so let she honest here, climbing is a sport of simplicity and bare necessities. A no frills type of sport if you will. I was drawn to UP by this very nature. As my favorite shoes moved to overseas production and an increase in weight / decrease in quality pushes me further away. Upon my first climb I found I purchased my ultimate shoe for all things steep. I was astounded at the precision these shoes provide along with the rubbers qualities. I can see how if you’re a “new climber” these would not be a good choice at all. I’ve been climbing for well over 15 years now and not once have I ever been greeted by a shoe with such precision OUT OF THE DAMN BOX! These are a no frills, performance shoe. Don’t even get me going on the Hell Hook abilities – UNREAL.

    I’ve been climbing for 15 years and finally found my perfect shoe! Thank you!

    Note : I Went 1/2 a street shoe down U.S. sizing and found them perfect.

  9. Karsten (verified owner)

    My favorite shoes were the old Dragon, but after 5.10 butchered them with the new version I moved on. The Sirius looked close enough, but isn’t quite the same. Overall so far I can say that I like them a ton!

    – Great rubber. Stuck to super polished Font edges and smears equally well,
    – Zero stretch so far.
    – Bigger toe hook patch that seems to work pretty well. I actually think these toehook better than my old Hiangles.
    – Heel fits me perfectly. It felt too stiff in the spine at first, but has softened up.

    – Laces are wayyyyy too long.
    – I got the same size as my old Dragons (10) and later got a 9.5. I think these are slightly higher volume and a bit longer at the same size or something. The 9.5 is great and had zero break in!

    If UP were to somehow make this into a slipper with the same closure as on the Leopard I think it would be the perfect shoe.

  10. Jeffrey Baratta (verified owner)

    I’ve been really psyched to try these out. Ordered a half size down from my street and quickly found out they were way too small. Believe me I like an aggressive fit and don’t mind the pain at the beginning but this was pretty next level.

    I followed directions for an exchange. Sent the box back with the filled out exchange form (UP does not provide a return label or pay for shipping after) I get it, don’t mind doing that… BUT I have yet to hear back about processing my exchange at all. It’s been a week since my return package was accepted at their facility and two emails later no response….

    A size exchange should not be this difficult. I am really excited to climb in these and give an honest review on the quality just hope I get my new size here soon. At least an email saying where they are at in the process.

    Gunna give 4 stars as the shoes looked amazing in person besides being too small. But 1 star on customer service at the moment…

    I’ll update my review here once I hear back and get my new size. 🙂

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