Climbing Harnesses Review: Mammut Sender - Gear Hacker

Table Of Contents

  • Comfort 80% 80%
  • Hanging Comfort 90% 90%
  • Gear Loops 90% 90%
  • Versatility 70% 70%

Weight: 320g

Gear Loops: 4

Ice Loops: 4

Leg Loops: Fixed

Price: $100

What We Like: Lightweight and plastic lower tie in protection

What We Don’t: One color option

A new harness on the market by Mammut, the Sender is their performance sport climbing harness. Equipped with plastic protection on the lower tie in and indicator stitching, there are a lot of things to like on the new Sender. At only $100, we wouldn’t call it a starter harness, but if you are an experienced climber looking for a tailored harness for sport climbing, this is the one. There are four loops compatible with ice tool clippers so it is also versatile.

We participate in affiliate programs to help us fund Gear Hacker. Some of the links in this website are affiliate links, which means that if you purchase a product using our link, we will earn a small commission. Don’t worry! This comes at no additional cost to you, and we will never base our reviews on whether or not we earn a commission off of a product. With that said, if you find our review helpful and decide to purchase an item we review, we would be very appreciative if you use our links to do so. It will help us bring you more awesome content in the future!

Compare to Similar Products

See Our The Best Climbing Harnesses Review 2020

Climbing Harnesses Review: Edelrid Sendero - Gear Hacker
  • Comfort 80% 80%
  • Hanging Comfort 80% 80%
  • Gear Loops 80% 80%
  • Versatility 100% 100%

Pros

Just About Everything

Cons

Having Five Gear Loops Is Starting To Show Off

Weight: 315g

Gear Loops: 5 

Ice Loops: 2 

Leg Loops: Adjustable

Climbing Harnesses Review: Arc'Teryx 395A - Gear Hacker
  • Comfort 80% 80%
  • Hanging Comfort 50% 50%
  • Gear Loops 100% 100%
  • Versatility 80% 80%

Pros

Built For The Alpine, Lots Of Features

Cons

Price And Leg Loop Comfort While Hanging

Weight: 395g

Gear Loops: 4 

Ice Loops: 4 

Leg Loops: Adjustable

Climbing Harnesses Review: Mammut Ophir 3 Slide - Gear Hacker
  • Comfort 70% 70%
  • Hanging Comfort 70% 70%
  • Gear Loops 80% 80%
  • Versatility 70% 70%

Pros

Plastic Protection For The Lower Tie In

Cons

Overall comfort

Weight: 420g

Gear Loops: 4 

Ice Loops: 0 

Leg Loops: Adjustable

Climbing Harnesses Review: Black Diamond Solution - Gear Hacker
  • Comfort 80% 80%
  • Hanging Comfort 80% 80%
  • Gear Loops 70% 70%
  • Versatility 60% 60%

Pros

Comfortable

Cons

Limited leg adjustment length

Weight: 330g

Gear Loops: 4 

Ice Loops: 0 

Leg Loops: Fixed

Climbing Harnesses Review: Petzl Sitta - Gear Hacker
  • Comfort 70% 70%
  • Hanging Comfort 60% 60%
  • Gear Loops 90% 90%
  • Versatility 80% 80%

Pros

Lightweight

Cons

Price

Weight: 300g

Gear Loops: 4 

Ice Loops: 2 

Leg Loops: Fixed 

Climbing Harnesses Review: Edelrid Jay and Jayne III - Gear Hacker
  • Comfort 60% 60%
  • Hanging Comfort 70% 70%
  • Gear Loops 70% 70%
  • Versatility 70% 70%

Pros

Sliding Waist Belt To Keep Loops Centered

Cons

Overall Comfort

Weight: 368g

Gear Loops: 4 

Ice Loops: 2 

Leg Loops: Adjustable

Climbing Harnesses Review: Black Diamond Momentum - Gear Hacker
  • Comfort 70% 70%
  • Hanging Comfort 60% 60%
  • Gear Loops 60% 60%
  • Versatility 50% 50%

Pros

Comfortable

Cons

Limited Leg Adjustment Length

Weight: 302g

Gear Loops: 4 

Ice Loops: 0 

Leg Loops: Adjustable

Climbing Harnesses Review: Petzl Corax - Gear Hacker
  • Comfort 60% 60%
  • Hanging Comfort 60% 60%
  • Gear Loops 50% 50%
  • Versatility 60% 60%

Pros

Double Waist Buckle Is Very Adjustable

Cons

Waist Buckles Can Take A Long Time To Get Perfect

Weight: 540g

Gear Loops: 4 

Ice Loops: 0 

Leg Loops: Adjustable

Climbing Harnesses Review: Petzl Aquila - Gear Hacker
  • Comfort 80% 80%
  • Hanging Comfort 80% 80%
  • Gear Loops 80% 80%
  • Versatility 80% 80%

Pros

Comfort Of The Larger Waist And Leg Loops

Cons

Ice Clipper Loops Are In The Way Of The Front Gear Loop

Weight: 345g

Gear Loops: 4 

Ice Loops: 2 

Leg Loops: Adjustable

Climbing Harnesses Review: Mammut Sender - Gear Hacker
  • Comfort 80% 80%
  • Hanging Comfort 90% 90%
  • Gear Loops 90% 90%
  • Versatility 70% 70%

Pros

Lightweight And Plastic Lower Tie In Protection

Cons

One Color Option

Weight: 320g

Gear Loops: 4 

Ice Loops: 4 

Leg Loops: Fixed

New to the market is the Mammut Sender. Mammut’s high performance, super lightweight, but very versatile harness for the mountain athlete. Coming in a very flashy orange, reminiscent of the Petzl Sitta, the Mammut Sender looks every bit as capable as it is.

Design

With a Slide-Bloc buckle that feeds the waist belt strap into well-placed keeper loops, the waist belt uses Split Webbing technology to keep the weight down but improve comfort along the back and waist of the wearer.

The leg loops are fixed but have an elasticated front band to allow for freedom of movement while climbing. They also have lots of venting to remain highly breathable. This is thanks to a laser-cut fabric that maintains durability but improves airflow. The lower tie in point is protected by a plastic guard to improve durability and reduce the wear of the belay loop and tie in points. The tie in points also have indicator stitching to show when the harness will need to be replaced. However, with the durable design features, the service life of the harness should be quite long, depending on any major incidents.

Climbing Harnesses Review: Mammut Sender - Gear Hacker

Comfort

Using Mammut’s Split Webbing technology (we’ve heard this term before), the harness has two pieces of webbing that run along the waist belt that is covered in a stretch mesh laser cut fabric. The main goal of the dual webbing is to reduce pressure points and keep the wearer comfortable. This harness succeeds at this task, and the Sender is comfortable and quite breathable, which is great for climbing hard in warmer climates. There is venting along the leg loops as well, which is always a nice touch.

The leg loops are connected with webbing to keep them organized and from riding up your legs too often while in a hanging belay. This harness is directed at performance climbers going for big objectives, so it is light. Do know that this may impact overall comfort, but the design is sound and the comfort is there overall.

Gear Loops

The Mammut Sender comes fully equipped to get you up your sport, trad, or ice climb. There are four gear loops; the two front loops are pre-shaped plastic to support a surplus of quickdraws and allow for easy access. The rear two gear loops are soft and lightweight to carry additional gear without adding too much excess weight.  

There is a haul loop at the back of the harness that is rated for 2kN of force. There is also an independent loop for a chalk bag at the top of the waist belt at the rear of the harness. The list of additional accessories continues as the Sender also has four ice tool clipper loops. So this harness is ready for any adventure in any climate, be it sport climbing in the Moab deserts or ice climbing in the Canadian Rockies.

Climbing Harnesses Review: Mammut Sender - Gear Hacker

The Bottom Line

The thought that has gone into the Sender is apparent. There is a lot of attention to detail, and that makes this harness one of the most versatile on our list for harnesses in 2020. At a price of only $100, the versatility that the harness provides makes it a very wallet-friendly harness as well.

The design and functionality make it a good one-quiver harness, but the fixed leg loops don’t make it a great harness for the alpine if you need to slip on a harness over crampons or ski boots. The harness is absolutely a performance sport climbing harness. It’s light, moves well, and is highly breathable, which is perfect for hard sport climbing. It is a very new harness so time will tell how the masses feel about it, but right now, this harness is a contender for the Best Sport Climbing Harness of 2020.

Compare Prices From Retailers Below

You help support Gear Hacker by purchasing from our retail partners.

We participate in affiliate programs to help us fund Gear Hacker. Some of the links in this website are affiliate links, which means that if you purchase a product using our link, we will earn a small commission. Don’t worry! This comes at no additional cost to you, and we will never base our reviews on whether or not we earn a commission off of a product. With that said, if you find our review helpful and decide to purchase an item we review, we would be very appreciative if you use our links to do so. It will help us bring you more awesome content in the future!