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Scarpa - Booster S Climbing Shoe

Scarpa Booster S Climbing Shoe

50% Off
$94.96 Original price:$189.95
Changing the size selection, or changing the selected color after selecting a size, may change the associated price

Item #SCR002D




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Tech Specs

Upper Material:
dual hook-and-loop
Flexan 1.0
Vibram XS Grip (3.5mm)
Asymmetrical Curvature:
Claimed Weight:
[single, size 40] 7oz
Recommended Use:
bouldering, sport climbing
Manufacturer Warranty:
1 year

A boost of performance.

Scarpa made the Men's Booster S Climbing Shoe for anything overhung at the local gym, sport crag, or boulder field. It has the same aggressive downturn and sharp asymmetry as Scarpa's Boostic Climbing Shoe, except Vibram's XS Grip rubber gives this shoe as softer feel for more sensitivity and friction. It features a unique Tri-Tension randing system that prolongs the shoe's downturn and pushes all the power directly to the toe for a technical performance. Expect the microsuede upper to stretch a half size to full size for a customized feel.

  • Aggressive climbing shoe designed for anything overhung
  • Sharp downturn stays downturn thanks to the Tri-Tension rand
  • Vibram XS Grip sole has a softer density for better friction
  • Mirosuede upper stretches to comfortably conform to your foot

Old boosters

  • Familiarity: I've used it several times
  • Fit: Runs large
  • Size Bought: 43.5

Looks like scarpa has upgraded these boosters and I'm thinking they are on sale to make room for the new models. I wear an 11 street shoe and the 43.5 fits like a glove. I wear a 43 in the Instincts, but wanted a more comfortable feel. These do not disappoint at 40% off. Great all around gym shoes. I climb v6/12a inside and have not popped off any holds with these.

Quite nice

  • Familiarity: I've used it once or twice and have initial impressions

Really good coming out of the box: excellent edging and heel power. True to size at this point but with how other people have commented, should have downsized a half size.

Thanks for the feedback Eugenel, let us know how they pack out!

Simply powerful

  • Familiarity: I've put it through the wringer

I got these shoes for christmas in a 38.5, I sized half a size down for performance! While the break in period was gnarly I love these shoes and how well they preform, they are stiff in the toe and arch making sure I can really dig my toe in on small holds and so i can get maximum smear power. I will never switch shoes after experiencing the booster s.

Simply powerful

Flexible and comfortable

  • Familiarity: I've used it several times
  • Fit: True to size
  • Size Bought: 39.0

Semi-aggressive shoe that is actually pretty comfortable to wear! I think this is due to the flexible mid sole. I normally wear a women's size 8 in street shoe sizing, and got the 39.0. This fits my toes like a dream, but the heel pocket is a little baggy on the sides (too wide). I wish they made these in a women's last, so I am dealing with the non-perfect fit. I couldn't size down without getting a ton of hotspots at the front of my foot.

Otherwise, shoe performs well, good feel on small edges. But, since they are a bit more flexible, it requires stronger feet than, say, Muiras.

superbly built shoe

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 40

purchased the same size as the scarpa instinct vs sz40 and felt a little smaller, although after breaking in they're comfortable enough to stand in for 10-15 minutes and sport climb in without sacrificing enough stretch to compromise the shoes ability to heel hook. For whatever reason i don't seem to see these at the crag as much as other scarpa shoes, (instinct, drago)but these truly are an exceptional shoe with a soft arch for flexibility but a stiffer forefoot that assists with edging. I wore 5.10 dragons for years and have switched to these for hard bouldering, they're slightly stiffer in the forefoot but the extra stiffness is beneficial on small edges so the advantage between the two is a toss up. From what i've noticed they're similar to the new popular la sportiva skwama but the booster s has an additional strap for stability. A 5 star product.


  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 9.0

Climber Description:
6 years of experience Bouldering and Sport.
Red Point V6; Climb V7- V8 regularly/ lead 5.12.
High arches, long toes, SHALLOW HEEL

I loved the toe on this shoe I could really feel the rock due to the sensitivity. However when I need the shoe for heel hooks, it had a tendency to pull off of my foot. Keep in mind I wear a regular size 10 and bought a 9.0. For the first two weeks my big toe was purple after thirty minutes. Another words the shoe was as tight as my foot would allow.

This brings me to the break in process, the shoes break in well and were comfortable typically after 15 minutes of stretching and the first 10 minutes of warm up. I could climb comfortably on the smallest of jibs in 20 minutes. After a month I could climb after 10 minutes. It has now been 4 months and the shoes have stretched to the point that the toe box is too wide (allowing toes to slide in shoe) and I can not press off of small jibs.

The rubber is great, I don't think its the stickiest I've climbed with but it was definitely a competitor.

Velcro is durable and lasts, no problem.

Ultimately I have to buy something different because I need to have a heel hook I can rely on. But I don't fault the shoes I fault my tiny, flat heels.

Side note: I know some really powerful climbers who swear by these shoes and I understand why.

Thanks for the review, Charles!

My foot is also long with a shallow heel. I seem to have a similar experience with these shoes - great until they stretched out and started slipping off on basic heel hooks. Haven't found an aggressive pair that aren't too tight on the toe box or too loose on the heel, though Scarpas in general are the closest fit so far. Are there any you recommend?

Overhangs Don't Stand A Chance

  • Familiarity: I've put it through the wringer
  • Fit: Runs large

This was my first pair of Scarpa climbing shoes and I was definitely impressed by what they had to offer. The shoes themselves are super sensitive, allowing you to feel what you're standing on and they're aggressive enough to keep you on the edge when you're deep in a cave. They do run slightly large though where I sized down from a 44.0 in La Sportiva Futuras and in other Scarpa shoes that I tried on, to a 43.5. Overall, these are my favorite sport climbing shoe that I have ever worn and I will definitely be coming back for more!

Amazing shoes

  • Familiarity: I've put it through the wringer
  • Fit: Runs small
  • Size Bought: 44

I got to demo these shoes first and went up a size or two then they fit snug but climbed amazingly better than my more comfortable beginner shoes. These are really good for tiny foot holds. They stretch in a little bit and become more comfortable after a few climbs

Amazing shoes

Amazing smearing shoe

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 39.5

Bought it for steep bouldering but turns out they shine on smears (smooth sandstone), tiny granite crystals (Buttermilks) etc. The shoe is very sensitive - i can feel tiniest credit card features - and very flexible - allows to stand fully extended on these features. The only bad is the baggy heel but i have narrow heel that fits in Dragons. The toe box is relatively wide (wider than Dragons/Pythons) which allows for great smearing.
Size comparison - i own Dragons 7.5 (very tight fit) and Pythons 37.5 (ok fit). Bought these in 39.5 - comfortable fit for all day bouldering/smearing

Go To Shoe

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 38.5

Awesome shoe that I use for bouldering and sport climbing, actually it is the only pair I have right now besides a pair of moccasyms for cracks. It is very sensitive and flexible with only a half sole. It is basically softer version of the boostic. It is pretty comfortable out of the box and breaks in very nicely. Scarpa is the only make that works for my wider feet. So if you want a high performance sensitive and precise shoe for wide or narrow feet, this is it.

It is a shoe

  • Familiarity: I've put it through the wringer
  • Size Bought: 42.5

Seemed to wear out sorta fast due to delam on the toe of one shoe. sensitivity and precision are top notch. The heel would probably be pretty good but they stretched out too much for me to know. They stretched a 1/2 size more than my vapors did. I suggest buying a half size down from your normal scarpa size.
Other shoes I wear:
Scarpa vapor V 42.5
Scarpa techno X 42.5
La Sportiva Solution 41
I got a 42.5 in the Booster S and should have got a half size smaller.

Great shoe!

  • Familiarity: I've used it once or twice and have initial impressions
  • Size Bought: 41

Hey guys just got this shoe little bit ago and it's such an amazing shoe. I do a lot of bouldering and wanted to get a more aggressive shoe and chose this one. Glad I did! I had the five ten Moccasyms before and they worked well but nothing like how this shoe performs. I was so confused on what size to get and ended up going from a normal everyday shoe of a 9 to these rock climbing shoes of a size 8. The size 8 (41) is real nice and snug on my foot and pretty tight. If you are a extremist on downsizing I am sure you could go down even further. Definitely would recommend this shoe is worth the money!

So much feel!

  • Familiarity: I've put it through the wringer

These are my new favorite climbing shoes. They are remarkably comfortable for how aggressive they are, and fit my foot like a glove. In my opinion, with the Booster S, Scarpa have found the perfect meeting place between power and sensitivity. I really like how well I am able to feel my footing with these shoes, and think that the psychological reassurance gained from that feel actually more than makes up for any physical loss in power resulting from decreased stiffness. These shoes are definitely very at home on the steeps, although I've enjoyed them on everything between that and mellow slab.

For reference: I size these one half-size smaller than my Boostics.

Highly recommend!

Wicked good shoe

  • Familiarity: I've put it through the wringer
  • Fit: True to size
  • Size Bought: 40.5

Awesome shoe for bouldering, sport and indoor. Here is a more thorough review I did. http://www.montanabouldering.com/2015/05/the-steep-climbing-weapon-scarpa.html

Foot Glove for Overhanging Rock

  • Familiarity: I've used it several times
  • Fit: Runs small
  • Size Bought: 41.5

This is easily the most sensitive shoe i've ever worn. It performs exceptionally well in steeper terrain, and allows your toes and feet to literally "feel" the rock.

I found it was really easy to find ideal foot positioning on holds, be able to turn or maneuver my purchase and adjust my body positioning. It has made moves that I thought were impossible into the realm of possibility. Im all about that sensitivity when it comes to steeper climbing, and dropknees in these bad boys is like a sensory overload.

They run a little bit on the small size, so half size up may be ideal unless you like that super tight fit or like punishing yourself.

can you give a size comparison to another brand?

They are pretty comparable in sizing to the La Sportiva Katana - i have both shoes in a 41.5 and they both fit great - the booster S fits a bit more close to the foot (due to there being less material) and has more sensitivity. but the sizing is on par with La Sportiva.

I also have a pair of five ten's in a 9 (comparable sizing) and these fit like a ferrari and the five tens are a honda civic.

Thanks man, I'm also trying to get away from the civic fit of five ten!

Can I ask what other shoes you've had? I was trying to decide between these, the futuras, and waiting for the new scarpa furia.

The futura is going to fit more like an aggresive slipper - Think Cobra (if you've had those previously) - while this shoe allows for a more tensioned active-rand fit - both are great for aggressive overhanging problems and routes.

The Furia is essentially this shoe - but with less rubber all around - a very flexible rand - and a touch more aggressive. Those shoes should be available within the end of the month.

I think these fit slightly bigger (higher volume midfoot) then the other Scarpas I have tried. I am sending my size 41 back, need a 40.5 which is out of stock but probably could even do a 40.

However I wear a 41 Instinct VS and its the perfect size and a much lower volume fit. That size is tight enough for bouldering but can still do sport routes comfortably. I had a pair of Boostics in 40.5 and they were too small and I didnt care for the insensitive toe and stiffness.

Other shoes I've worn:
Katana 40.5 (these run small in toes so I am + .5 size over other Sportiva shoes )
40 in Solutions (can fit a 39.5 but deadly tight until resoled)
39.5 Futura (same deal 39 is better after resole)


Footwear & Boots
  3 4 2 34.5 / 35
 21.5 3.5 4.5 2.5 35 / 35.5
 22 4 5 3 35.5 / 36 36 / 36.5
23564 37 / 37.5
23.5 5.5 6.5 4.5 37.5 / 38
24 6 7 5 38 / 38.5 38.5 / 39
25786 39.5 / 40
25.5 7.5 8.5 6.5 40 / 40.5
26 8 9 7 40.5 / 41 41 / 41.5
279108 42 / 42.5
27.5 9.5 10.5 8.5 42.5 / 43
28 10 11 9 43 / 43.5
28.510.511.59.5 43.5 / 44
29111210 44.5 / 45
29.5 11.5 12.5 10.5 45 / 45.5
30 12 13 11 45.5 / 46
30.512.513.511.5 46 / 46.5
31131412 47 / 47.5
31.5 13.5 14.5 12.5 47.5 / 48
32 14 15 13 48 / 49
32.514.515.513.5 49 / 50
33151614 50
*1 EU whole size = 6.6mm = 0.26in
*1 US whole size = 8.4mm = 0.33in
*the 30 EU sizes above cover the same size range as 24 US sizes
more EU sizes provides a better, more precise fit for your intended use

ROCK SHOES: downsize 1/2 to 2 full sizes from street shoe size
*downsizing depends on model, intended use, and personal preference

MOUNTAINEERING: upsize (1/2+ sizes) depending on desired fit
*Scarpa plastic mountaineering boots are based on the UK sizing scale

SKI BOOTS: all Scarpa ski boots are measured in Mondo sizing
*highlighted (or not) sizes share the same shell size; the liners are lasted for each 1/2 size
*some skiers may want to downsize up to 1 full Mondo size, depending upon personal preference
Boot Sole Lengths
Mondo Size22.5 / 23.023.5 / 24.024.5 / 25.025.5 / 26.026.5 / 27.027.5 / 28.028.5 / 29.029.5 / 30.030.5 / 31.0
F1, F1 Race, F1 Carbon 268mm 276mm 285mm 292mm 301mm 310mm 318mm 326mm 334mm
Mondo Size22.5 / 23.023.5 / 24.024.5 / 25.025.5 / 26.026.5 / 27.027.5 / 28.028.5 / 29.029.5 / 30.030.5 / 31.031.5 / 32.0
Maestrale, Gea 271mm 280mm 288mm 297mm 306mm 314mm 322mm 331mm 340mm 348mm
Mondo Size23.5 / 24.024.5 / 25.025.5 / 26.026.5 / 27.027.5 / 28.028.5 / 29.029.5 / 30.0
Alien 262mm 271mm 279mm 287mm 296mm 305mm 313mm
Mondo Size21.5 / 22.022.5 / 23.023.5 / 24.024.5 / 25.025.5 / 26.026.5 / 27.027.5 / 28.028.5 / 29.029.5 / 30.030.5 / 31.0
Freedom 257mm 267mm 277mm 287mm 297mm 307mm 317mm 327mm 337mm 347mm
Mondo Size22.5 / 23.023.5 / 24.024.5 / 25.025.5 / 26.026.5 / 27.027.5 / 28.028.5 / 29.029.5 / 30.030.5 / 31.0
T1 283mm 292mm 300mm 309mm 318mm 327mm 335mm 343mm 351mm
Mondo Size22.5 / 23.023.5 / 24.024.5 / 25.025.5 / 26.026.5 / 27.027.5 / 28.028.5 / 29.029.5 / 30.0
TX Comp 275mm 283mm 291mm 299mm 307mm 316mm 325mm 333mm
Mondo Size21.5 / 22.022.5 / 23.023.5 / 24.024.5 / 25.025.5 / 26.026.5 / 27.027.5 / 28.028.5 / 29.029.5 / 30.030.5 / 31.031.5 / 32.0
T2 Eco, T4 277mm 284mm 291mm 299mm 307mm 315mm 324mm 332mm 341mm 350mm 358mm