Below you’ll find our review on the Red Chili Jamrock Crack Gloves. We tested every crack glove we could get our hands on and compare the pros and cons against all the other glove options out there. (Future reference, you can see every model of crack gloves on

Red Chili Jamrock making a fist jam
The Jamrock crack glove from Red Chili is comfortable on the wrist and fingers and has a good amount of padding and coverage for its thin status. Thumb coverage however, is lacking and it can be tough to find the right size.

Fit Overview

Fit Overview for Red Chili Jamrock Crack Glove

Brand Sizing – Tough without trying on. Red Chili’s size ranges have a lot of overlap. We found that if you are across 3 size ranges (fairly common) that choosing the middle seemed to work best. Those across 2 size ranges or at the border tended to size up.

  • This is the hardest glove to fit from measurement out of all that we have tried. Similar to a lot of other brands, the range of each size is consistent at 2.5cm for each. (e.g. XS fits 18-20.5cm, S fits 19-21.5cm etc.) resulting in each size overlapping the one before and after it by a full centimeter.
  • This means that someone with a 19.5mm size ‘fits’ XS and S, according to Red Chili. Those in higher up sizes (including myself at 21.5cm) find themselves overlapping S, M and L– all of which fit very differently. (see size comparison below)
  • It’s tough to say for sure why Red Chili chose to have such a large amount of this overlap, when every other brand’s sizing run each end to end. Ultimately the net effect of this sizing scheme makes it tough to call whether you’ll be wanting to size down or up by using a single measurement. We’ve found that aiming in the center of 3 sizes is pretty good, (if not a touch baggy) and choosing the larger of two sizes for those on the border yields about the same fit.

Note: The extremely thin and soft suede of the glove does give a lot of stretch in the fingers for those who choose to undersize, but there is a limit. We haven’t seen any tear-out yet but judging by the performance of similar materials in other thin gloves, we can definitely see the potential, so be warned. We have found in the gloves we’ve tested that there is a much larger gap in size between M and L (pictured below).

  • We’ve also found that due to its stretchy nature this gloves lends itself to being overtightened and cutting off circulation, which is something to watch out for. Thankfully the wrist strap is very long and offers a ton of flexibility when dialing between sizes.

Hand coverage – Average to slightly above. Knuckle coverage suffers noticeably when sized down, but back of wrist stays mostly protected. Zero thumb protection.

  • Depending on where you choose in your range, the amount of rubber across the knuckles can range from plenty to not quite enough. We have found the ‘sweet spot’ for most folks in regular hand jams to be at or below the mid mark in their fit range, while those doing more fists preferred to size mid to up.
  • Wrist coverage for sized down gloves does shorten a little, and can leave a bit of the outer wrist bone exposed if you have tall hands, while mid-sized gloves provide tons of great, flexible protection.
  • Like most gloves on the market, these choose to completely forego thumb protection. If you’re expecting to use these in fists or stacks, make sure you bring tape to supplement.

Jamming Performance – Moderate to good in most jams below fists. Great padding in sharp cracks for a thin glove. The Jamrock is a bit too soft for flaring fist jams and a bit unstructured to build really solid stacks.

  • In thinner to wide hands the Red Chili Jamrock has performed pretty well. The rubber is nice and sticky once it makes contact and because the suede is so thin (thinnest we’ve measured) the 1mm of rubber thickness gets to deform and create friction as you would expect.
  • We found these performed best in medium to large hands on splitter and irregular cracks. The very flexible wrist coverage provided from the microfiber combined with a strategic cutaway in the rubber backing also helps with wrist flexibility without compromising jamming position. When tape is added underneath, they also do a decent job helping those with thinner hands fit into rattly jams, thanks to the silicone dots reducing the glove shifting.
  • When it comes to fists and wider the Jamrock was ok when slightly oversized, though like all gloves lacking thumb coverage they simply can’t go it alone without tape. The thin glove/thicker rubber combo Red Chili went with helps performance when it comes to flat and flexible situations, but when it comes to building hand stacks, yanking hard on them, and twisting into odd fist pods, they simply aren’t robust enough to hold up to the forces and usually deform and twist mid-jam, losing contact with the rock. You can add rigidity from tape, but we found it has to go outside the glove, which sort of isn’t as much the point of having crack gloves.
Sizing Comparison for Red Chili Jamrock Crack Glove
The size gap from M to L in our testing seemed to be a bit larger than the specs provided by Red Chili. According to their size chart a 21.5cm hand (shown here) falls inside S, M, & L range for the Jamrock. We found S to be unusable, M to fit slightly tight, and L to feel a tad baggy.

An entire blog post dedicated to how to fit crack gloves.
How To Fit Crack Gloves

Comfort & Feel

Comfort and Feel for Red Chili Jamrock Crack Glove

Finger Comfort – Good to very good. This is the thinnest material used by any of the brands we’ve tested. Even when sized down slightly, it is soft and stretchy and hasn’t rolled up or stiffened on us yet.

  • Similar to other thin gloves we’ve tested, the Jamrock feels soft between the fingers and doesn’t tug as much as it stretches. This leads to a feeling similar to that of a driving glove as it tightens and feels sturdier as you make a fist.
  • The finger holes seem pretty average and scale well as the glove size gets larger. Getting them on and off might be a slight bit more chore for those with thicker fingers, but once they are on we found most people aren’t bothered by them.

Glove Stiffness – Semi-Soft. The stiffest of all thin gloves and the most flexible with this much rubber. A good compromise for those needing more volume and padding who don’t need rigidity for fists and stacks.

  • This is the thinnest microfiber we’ve seen used on a piece of climbing gear, much less a crack glove. Normally this would make for a very soft glove, but Red Chili has chosen to put 1mm of rubber on the Jamrock, which increases it’s stiffness quite a bit.
  • Even though the rubber is thick, the combo with the mega soft suede doesn’t handle a huge amount of torsion when it is twisted in a jam. Definitely more structure than the Black Diamond or Outdoor Research crack gloves, but not so stiff that is restricts movement much in smaller jams. It’s a good compromise and balances pretty well as long as you don’t need to twist it too much.

Padding – The most padding on all the thin gloves. If you’re into thin hand jams and need some extra absorption or to fill some space, these are a good option.

  • Though they aren’t the greatest at keeping shape in wide stuff, when it comes to filling hand jams and off-hands-sized pods, we find the Jamrock to perform quite well. In situations where cupped hands often cause folks to resort to building up with tape in order to make a jam work for their skinny mitts, we had more than one occasion of the Jamrock being able to provide just that extra little bit of thickness without getting too chunky.
  • This thickness also helps soak up some sharp bits inside cracks, and because the glove remains fairly flexible, we even found it can deform around sharp lips of cracks and add a little extra grabbiness when jamming into dihedrals or pulling lieback jams.
  • Bigger crystals and conglomerate start to press a bit too much for the 1mm of rubber to handle on its own, but without stepping into a much stiffer glove we found these performed admirably.

Glove Height – Right in the middle of the pack. When worn undersized, they can get pretty short and lose some coverage of the wrist bone. Mid to over sized cover well and the very flexible wrist is one of the most comfortable out there.

  • This is another bit that hinges a lot on which direction you choose to go in sizing. An undersized glove can perform well and feel like a bit of extra skin, but it will result in less wrist coverage because the gloves get very short as they go down in size.
  • Tall hands with long fingers who want wrist coverage should size up.

Build Features

Build Features for Red Chili Jamrock Crack Glove

Notable Features – Things that are only found on the Red Chili Jamrock Crack Glove

  • The Jamrock is the only glove on the market that has attempted to combat the issue of a glove’s tendency to slip on the hand during a jam. Other brands using microfiber or leather that don’t have this feature can tend to get a bit slippy once they are broken in and they get heated up from a session of jamming. It isn’t much, and we must say that it is something that not everyone has even reported noticing. At first glance, these silicone ‘dots’ didn’t seem like they would help much in this endeavor, but we have actually found them to slip noticeably less, especially when the glove is oversized or when the weather is hot and sweaty.
  • The narrow, tapered strap is completely backed by the thin microfiber of the glove, which might seem like an obvious decision, but not every glove does this. This makes the wrist strap a lot more comfortable against the skin no matter what size you adjust the wrist to, and because it is so narrow, you can pull a lot of strap through to tighten it if you have particularly thin wrists.
  • Because the difference of stiffness between the glove suede and the rubber backing is so great, Red Chili made a great decision and provided a cutaway at the bottom to allow the wrist to bend naturally. Other brands have chosen to either put a gap or a slit in the rubber to marginally increase articulation, or in the case of Singing Rock, even completely remove wrist coverage completely. This cutaway paired with the soft microfiber makes these the most comfortable on the wrist that we’ve tried.

Performance on Rock

General Rock Experience for Red Chili Jamrock Crack Glove

We should say that overall we have had the Jamrock crack gloves the least amount of time of all the gloves we’ve tested so far, though it has still been over a year. In that time we’ve found that like most thin gloves, they are at their best in a splitter hand situation on even cracks. When worn undersized, we have found them performing well in thin jams despite their chunkier rubber for their class, and when stepping into cracks with uneven or sharp lips, they were one of our favorites because they just seem to stay with your skin a little better. Not quite like tape that literally attaches to you, but enough to notice when the wrenching in and around corners became necessary, or for those with sweaty hands.

When jamming in conglomerate and sharper irregular cracks, the thicker rubber does offer a noticeable amount of padding, and because the rest of the glove is so thin the Jamrock can still deform and squish into corners and jams on routes with polished crux features a bit better than gloves with thinner rubber.

As cracks widen and flare a bit these start to have many of the same issues we’ve found in all thin gloves. Despite the thicker rubber, they lack the structure to hold shape in flaring jams and can still bunch and lose rock contact, though maybe slightly less than their thinner cousins. We have found these gloves to handle undertaping better than most, thanks to their stretchy finger loops and anti-slip dots, though they still don’t hove the same response and structure as a thicker glove on sharp jams. Building hand stacks can work out ok by taping over the gloves to add rigidity, but at the cost of loss of friction from the rubber, at which point why not tape literally anything between your hand and a tape glove?

On slick jams these have a similar grip to most gloves using a version of climbing shoe rubber (Grivel Star Crack, or both Ocún models) though due to their thinness, really perform best on perfect hands and don’t do well at all when flaring pods come into play. We tried them on narrow limestone cracks specifically and found they weren’t quite robust enough to absorb the full brunt of sharp crack edges as we had hoped, but did grip better than other thin gloves thanks to the 1mm of shoe rubber backing.

When comparing to all other gloves on the the thin/flexible side of the market, the Jamrock definitely stands out as a chunkier, more padded and stiffer glove. They’re tough to size correctly, though sizing down a bit hasn’t produced too many issues for our testers. Durability of the finger loops is a bit of a question mark, though we haven’t personally witnessed any blowouts, so those expecting to really wrench and abuse a pair of crack gloves should be wary. Overall we’ve found them to be a comfortable wearing glove that adds a bit of extra padding for their weight class, and sticks to the hand a bit closer to tape than any suede glove we’ve tried.

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Jeff Jaramillo

Jeff Jaramillo

Jeff currently lives in the Midwest and spends most of his free time answering questions nobody asked. When not plugging gear on moderate warmups and calling it a day, he can be found whining about whipping on bolts in the gym or at the local pub waxing poetic about climbing saving humanity and the planet.

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