Black Diamond Wiz

Priced: $18.95 - $44.95 Rated:   - 5 stars out of 5 by 34 reviews.
Black Diamond Wiz
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Color: Raspberry
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Black Diamond Wiz -

Designed to be a mini version of our new Momentum Harness, the Wiz Kid has all of the comfort and durability of other Black Diamond harnesses. With fixed gear loops and a belay loop, the Wiz Kid's modern styling allows a child to climb alongside his or her idol and still look cool. Recommended for top-roping only.

FEATURES of the Black Diamond Wiz Kids' Harness.
SPECIFICATIONS of the Black Diamond Wiz Kids' Harness.


  • Perfect for growing kids, Black Diamond's trakFIT leg loop adjustment system uses a simple slide adjuster to quickly and easily adjust the diameter of the leg loop and provide a wide range of fit
  • Black Diamond Wiz Kid climbing harness fits a weight range from 35 - 110 lbs. (16 - 50kg)


  • Just like the Momentum and Primrose harnesses, the Wiz Kid features Black Diamond dual core construction
  • 2 pressure-molded gear loops are reinforced with nylon webbing to provide racking space with high strength
  • Bullhorn-shaped waistbelt with Dual Core Construction™ features 2 separate bands of webbing that distribute pressure; allows great breathability


  • Venting OpenAir foam insert in the center to offer breathable, lightweight comfort without pressure points


  • trakFIT leg adjustments feature simple slide adjusters along the leg-loop webbing; trakFIT is quick and easy to adjust and requires no doubling back
  • Two slim bands of high-tensile webbing on the outer edges of the waistbelt


  • Top roping only
  • Always read and understand the warnings and instructions that accompany your gear.**
  • Pre-threaded Speed Adjust waistbelt buckle
  • Harness features a lightweight aluminum Speed Adjust buckle at the waist that is prethreaded for quick and secure 1-handed operation
  • Comfy and stylish
  • Patent-pending trakFIT leg loop adjustment for easy, worry-free adjustability of women's-specific OpenAir leg loops
  • Adjustable, releasable rear elastic riser
  • For safety and/or sanitary reasons, this product CANNOT be returned

A decked-out kids' harness built for up-and-coming rock monkeys, the Black Diamond Wiz Kid packs all the features of Black Diamond's adult harnesses in a smaller size. Just like the Momentum and Primrose harnesses, the Wiz Kid features Dual Core Construction, which uses two slim bands of high-tensile webbing on the outer edges of the waistbelt and a venting OpenAir foam insert in the center to offer breathable, lightweight comfort without pressure points. And for growing kids, the trakFIT leg loop adjustment system uses a simple slide adjuster to quickly and easily adjust the diameter of the leg loop and provide a wide range of fit.
The Black Diamond Wiz climbing harness for kids is a great starter harness to get those little ones up on the rock or in the gym.
Perfect for kids 5-10 years old.
Adjustable waist belt and leg loops allow for a good fit on a variety of kids.
No buckle, no hassle — trakFIT is a simple and secure innovation for adjusting leg loops that uses a slide adjuster for quick and easy fitting. To tighten or loosen, simply move the slide adjuster along the leg loop's webbing. The diameter automatically adjusts and provides an incredibly wide range with no dangling webbing and no chance of mis-threading.
Recommended for top-roping only.
Get the kids on the rock with you in this great kids climbing harness.
If your young climber is clambering up the pantry walls in the noble pursuit of cookies, direct the vertical energy with the Black Diamond Wiz Kid Harness. Just because it's designed for the younger generation doesn't mean that BD skimped on quality. The Wiz Kid comes fully loaded with molded gear loops, padding, Speed Adjust buckles, and detachable back straps for a fully crag-worthy piece of gear.

Al's Sports
Designed to be a kid's version of Black Diamond's new Momentum Speed harness, the new Wiz Kid features one Speed Buckle for quick and safe adjustment. The modern styling allows a child to climb alongside an idol and still look cool. Recommended for top-roping only. One size fits kids from 35-110 pounds (16-50 kg).

Built specifically for young rock climbers, the Black Diamond Wiz Kid climbing harness provides the same level of comfort, ventilation and durability found in adult harnesses.


Rock/Creek Outfitters

The Wiz Kid Harness by Black Diamond is made for any kid that wants to get out and climb with Mom and Dad (made for top roping only). Designed to be a kid's version of the Momentum Speed, the Whiz Kid has one Speed Buckle for quick and safe adjustments, and comes in one size that fits kids from 35-110 pounds (16-50 kg).

Appalachain Outdoors
The Wiz Kid Climbing Harness from Black Diamond is perfect for the younger generation of "rock" stars. It has all of the features of an adult harness but in a smaller form.
Specifically designed for the budding alpinist, the Wiz provides functional, toned-down illumination for backcountry, backyard, and home exploration.
Elastic strap features fun graphics and releases under force to prevent getting stuck.
Ultra-compact, batteries-in-the-front design uses 2 AAA batteries.
Settings include full strength, dimming and strobe.
CPSIA certified with child-safe screw closure and breakaway elastic safety strap.
Powers off after 2 hours to avoid accidental battery drain.
Protected against splashing or sprayed water from any angle.
Requires 2 AAA batteries (Included).
Half-Moon Outfitters
Pre-threaded Speed Adjust waistbelt buckle
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Average Price History: Price History
Review RatingNumber of Reviews
Adjustable Leg Loops:yes
Available color:Raspberry, Cobalt
Average weight - metric:240 grams
Belay Loop:Yes
Body Weight:35-110 lbs
Bulb type:Two SinglePower LEDs.
Droppable leg loops:Yes
Fit:One size fits 35-110 lbs (16-50 kg)
Fits waist:22 - 28 inches
Gear Loop:yes
Gear loops:2 loops
Haul Loop:yes
IPX rating:4.
Leg Loop Type:Adjustable
Leg loop size:16 - 20 inches
Legs:16 - 20" / 41 - 51 cm
Main Buckle Closure:Pre-Threaded
Material:210d nylon twill + 150d polyester mesh, 4-way nylon knit
Max burn time:120 hours.
Max distance:20 m.
Padded Leg Loops:Yes
Padded Waist Belt:Yes
Padded waist:Yes
Waist:22 - 28" / 56 - 71 cm
Waist size:22 - 27 inches
Weight:360 g (12.7 oz)
Weight with batteries:56 g / 2.0 oz.
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Black Diamond Wiz Reviews:


We looked at the few different kid's options that we could find. Although there aren't many, it seemed the most popular were this and the Petzl full body harness. We chose this for several reasons.
This harness is constructed just like the adult Momentum and Primrose harnesses that my wife and I use - padding, ventilation, trakFit leg loop adjustment, Speed Adjust waist buckle and so on. This little harness is well built.
As your kid grows, they may or may not want to move out of a full body harness to be like the "big kids". This harness will be great as our child gets older and becomes more advanced. She was 5 last year when we first put her in this harness and at the bottom of the weight limit (35lbs). She will get many more years of use out of this harness.
Our daughter climbs both outdoors and in the gym. She spent a week this summer at a climbing class. She has never complained of any discomfort from this harness and loves it.
I would definitely recommend this harness to a friend without hesitation.

shaun Moyes at on 08/09/2013

Great Harness

We have three boys that climb 13, 7, and 4. This is the second generation of this harness we have bought, and we love this thing! The best improvement they made is that it fits a wider range of kids including our four year old very, very well! Before buying I put him in it and gave him the upside fall test, it held and he wanted to do it again and again! It seems to be lighter and more breathable than last year's model, and isn't junk made for kids. It looks to be a scaled down version of the adult harness. The new leg loops are pretty awesome to the slide adjustments are the easiest use leg loops we have used. In my opinion the best kids harness on the market this year!
Follow Me at REI on 11/11/2011

My son decided he wanted to be a big boy and ditch his full body Petzl. We had him try on this and the Edelrid Finn. The Finn was great because the waist was adjustable, meaning his tie in point was always centered. It also had a sliding buckle, meaning putting it on and adjusting it was much faster. Unfortunately the color scheme and padding were the downfalls.
That's where the Wiz Kid comes in. It has enormous amounts of padding, making it comfortable to hang in for a long time. It also has a better color to it, two options (instead of unisex), and has 'cool' gear loops.
4/5 because it could be better with a sliding waist belt and sliding adjust buckle.

uskp407682 at on 04/22/2013

She's 52 lbs. if I feed her any more it will not fit much longer, one size fits " few" not all- best bet on kids girls harness's go XS womens you will get many years of growth out of it, Wiz kid Harness is made well and is adjustable to some extent, if your lil boulder baby loves Placsti'n and the rocks go womens small, other than that- outstanding product if you want to replace it next season. Kids grow fast when they eat plenty of vegetables!

pon4907715 at on 10/16/2011

Good comfortable harness for kids

This is a good quality harness that I would expect from Black Diamond. My daughter definitely prefers it to the standard gym harnesses. Her one complaint is that the elastic straps that hold up the leg loops are not adjustable. She says that the leg loops always feel like they are too loose and falling down. The leg loops do ride low on her when she isn't tied in. This hasn't proven to be a safety or comfort issue when she is tied in.
Climbing dad in SATX at REI on 01/01/2012

Purchased one orchid and one red Wiz Kid

I had originally purchased BD Momentum in XS as I read two reviewers say they used it on their children almost the same age as mine 5 and 7 y.o. However way too big for my kids. So I broke down and purchased these. Much better fit for my kids. Unlike the Momentum, these had adjustable leg straps. I have the BD Primrose which has a velcro under the waist strap. I would have liked to have seen that on the Wiz Kid Harness.
wickedywackedy at Rock/Creek Outfitters on 02/02/2010

Great Harness!

I purchased this harness for my 4 year old twins to use during some basic top rope gym climbing. Although my one daughter is petite, it still fits her very well. It's easy to get them into it, and stays in the right spots when they're actually climbing.

I would have purchased this from my local REI store, but they were out of stock for so long that I ended up getting it from my local climbing gym.
Matt S at REI on 07/07/2013

"Just like yours Daddy!"

That is what my kids exclaimed when they saw the Wiz. I bought the Wiz harness for my 6 y/o son and it fits my 4 y/o daughter too. It's a great way to get them introduced to the sport and to keep them enthused about the outdoors. The speed adjust buckles make it easy to adjust between my two kids.
Steve at Rock/Creek Outfitters on 11/11/2013

Great Product for Kids

REI made sure the harness fit my 7-year old and we've been using it for over 2 months and have no complaints. It fits well and it is much better than using the rentals. My son has no complaints about the harness and he likes it much better than the rentals they have available.
QueenieMel33 at REI on 09/09/2013

Works exactly as advertised. Good quality and fit. Highly recommended. I can find no faults with this harness, the kids love it, and the price is right. Nice piece of beginner equipment, fits my nine year old perfectly and seems like she will have at least two or three more years with it.

mike at on 01/08/2012