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Black Diamond
Cosmo 350-R Headlamp

4.615384615384615 out of 5 stars
26 Reviews
Current price: $44.96 Original price: $59.95
25% off
Color:Graphite

Size:

Quantity

Only 2 In stock


Why We Like The Cosmo 350-R Headlamp

Stargazing is best done without a light, but we always need a bit of brightness to help us get to the tent. Black Diamond's Cosmo 350-R Headlamp comes in handy every camping trip every night, and it's even helpful for housework in all the nooks and crannies.


Details

  • Black Diamond's headlamp for camping, hiking, and all-purpose outdoor activities
  • 350 lumen max output adjusts to dimming, strobe, and red settings
  • Rechargeable battery with micro USB charge port
  • Housing is waterproof tested to work under 1 meter of water for 30 minutes
  • Adjustable headband is made of Repreve recycled materials
  • Item #BLDZ9IE
Power Source
rechargeable, 1500mAh li-ion
Batteries Included
yes
Modes
dimming, strobe, red LED, lock
Lumens
350
Distance
[high] 210ft [medium] 147ft [low] 32ft
Strap
recycled elastic
Waterproof
IP67 (1m for 30min)
Includes
charging cord
Claimed Weight
2.6oz
Manufacturer Warranty
3 years
Activity
camping, climbing, hiking, backcountry touring

What do you think about this product?

Overall Rating

4.5 based on 26 ratings

Review Summary

1 Stars - 1 reviews
2 Stars - 0 reviews
3 Stars - 1 reviews
4 Stars - 4 reviews
5 Stars - 20 reviews

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5 out of 5 stars

August 28, 2025

So bright and lightweight

I like these black diamond headlamps so much. Something about the way they do the headband makes it very easy for me to adjust to my head. Lamp tilt down and can shine in my path. The dimming feature can get a nice dim, white light. Or the full bright is exceptionally bright. I use this when I'm backpacking. I like that the rechargeable option will work with my battery pack so that I don't have to carry spare AAA batteries anymore.

Kyle C.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

4 out of 5 stars

August 16, 2025

Lightweight and long battery life

Love BD headlamps, and love this one in particular for its light weight, functionality (red light a must!), rechargeable long battery life. My one ding on the BD headlamps is that the headbands tend to stretch out over time, so I have to replace them every few years.

Courtney W.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

April 23, 2025

Solid headlamp

The rechargeable feature was a no brainer. Much better than carrying extra batteries. 350 lumens is plenty bright. It's easy to change the brightness and switch to the red light.

Quinn L.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

4 out of 5 stars

January 27, 2025

Favorite headlamp yet!

Pros: bright enough for everyday tasks, red light is great, easy to adjust brightness, textures on/off button is easy to feel through gloves, light is compact. Cons: the blue battery indicator lights shine brighter than the red light its self when turning the headlamp off, an upgrade to USBC would be nice, micro USB feels outdated.

Simon B.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

January 3, 2025

The head lamp that never needs batteries

Hey black diamond has always been my go to head lamp for dawn patrol ski missions or early morning runs. But now it’s rechargeable. Same solid light without the risk of the batteries needing to be changed

Jason H.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

1 out of 5 stars

December 27, 2024

Have no idea if this is any good---infographic instructions make NO NO NO sense!!!

Just received this headlamp as a Christmas gift. Instructions make NO sense whatsoever. I have no idea how to turn this thing on, change the lighting mode, etc. Maybe someday I can change this rating, but as of now it is just a paperweight.

MA u.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

November 21, 2024

Lightweight and bright!

Great little headlamp. Very lightweight and bright enough for anything.

Laurie S.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

November 19, 2024

Great light for a good price

Light works great for running. It has very little bounce, and it is lightweight.

Raymond L.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

August 14, 2024

Great headlamp

Lightweight, great for trail running, backpacking trips, etc.

Brendan O.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

5 out of 5 stars

July 29, 2024

Nice little head lamp

I like the rechargeable capabilities. Very bright head lamp and isn’t too heavy.

Tim V.
blackdiamondequipment.com

Originally reviewed on blackdiamondequipment.com

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