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About Mammut Smart Belay Device

Closeouts. Easy to use, lightweight and affordable, Mammut's Smart belay device features an auto-locking design that works well for top-roping, belaying and rappelling.


Specs about Mammut Smart Belay Device

  • Material: Aluminum, composite
  • Weight: 4.7 oz.
  • Dimensions: For use with rope diameters of 8.9 to 10.5mm
  • Made in Italy
  • Visit our Climbing Gear Guide
  • Climbing activities are inherently dangerous; we recommend getting proper instruction on its correct and safe use -- for any refund, climbing gear must be returned in its original packaging/coil, and have original hangtags and plastic wrapper
  • US shipments only


Do you own this product? Write a review and help others with their buying decisions!

4.615384 5 Overall Rating: 4.6 Based on 13 reviews

Most Helpful 5-Star Review

Reviewed by Stupid Sexy Flanders from Austin on Wednesday, July 31, 2013
My wife and I came to the conclusion that we needed an assisted breaking device for our climbs due to some recent stories about people fainting during belaying. This isn't a common problem with either of us but in rock climbing you have to do everything you can BEFORE you start your climb to prevent... Read More
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  • Reviewed by someatxclimber from tx on Monday, December 29, 2014
    First and foremost all these assisted breaking devices that follow this same principle where the carabiner pinches against the rope tend to have a important flaw that while the initial breaking force is high without requiring high break hand force, when the load is very, very high the carabiner can only pinch so much, it is physically limited. When the carabiner is at this physical limit the angle of the rope going through the device is less than even a normal ATC-XP / Guide, because of this lessened angle the friction gained from this angle is less than the friction gained from the angle in an ATC-XP / Guide... Soo... At very high force you actually need higher break hand force with a Smart (or megajul, etc) than you would with an ATC-XP / Guide... It is not immediately intuitive as it obviously feels that it locks up so easily, thus it must lock up stronger at higher loads, and this is true, but only to a point, beyond that point normal ATC-XP / Guide is superior.
    References: Jim Titt and rgold, ex: http://www.mountainproject.com/v/edelrid-megajul-belay-device/109133730__1
    A thread discussing assisted breaking belay devices with graphs of Jim Titt's test data comparing many.

    ... That said I love using it for top roping. Light, smooth, and simple.
  • Verified Buyer Reviewed by Camilo from NC on Saturday, September 13, 2014
    This Self locking device for less than $20 is great. I always wanted to have a self locking belay device but didn't want to pay the $100 for a Gregory.......I was hesitating when I got into this Mammut Smart Device since it was too good to be truth, I bought one and so far I love it!
  • Verified Buyer Reviewed by Mighty Mo from Portland on Thursday, June 26, 2014
    It took some getting used to, as it's different from a tube device or a grigri. But once you get the feel of it, it just feels natural. The feeding of rope while lead climbing is awesome and it cams the rope beautifully when there is a lead fall, giving it a slightly dynamic belay. Top rope belaying is awesome! It works like a grigri, but way, way cheaper thanks to Sierra Trading Post!
  • Verified Buyer Reviewed by WJB from upstate New York on Sunday, May 25, 2014
    Just what my disabled wife needed.
  • Reviewed by yositune from Alexandria, VA on Friday, May 2, 2014
    I think this has less buzz lately after the Edelrid mega jul and others have gotten more press. I still think this is a really handy device, cheap, and has great autolocking response. I've not used the alpine versions but would expect the autolocking to be similiar and offer guidemode and 2line rappeling.

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About Mammut

Mammut is a Swiss-based producer of high-quality mountaineering, climbing and trekking equipment. The company’s history actually dates back to the mid-1800’s, beginning with a single rope maker named Kaspar Tanner. By the 1940’s, the brand had officially adopted the mammoth logo and name. Originally specializing in Mammut ropes, the well-known alpine gear company eventually grew its product line to include mountaineering boots, crampons, harnesses and hardware. By the 1990’s, the product selection had grown even further to include Mammut jackets, pants, sleeping bags, Mammut packs and a host of other premium-quality essentials for the outdoor enthusiast.