The Riven Cosmic Series Bundle includes three adhesive patches with black, blue, and white arrow designs and center cutouts for medical devices—ideal for elk hunting fans or diaphragm call users.
Three Riven Cosmic Series bicycle handlebar stems—featuring black, navy blue, and white paper plane patterns—are arranged vertically on dark, cracked wood, resembling a neatly organized display of premium elk hunting mouth calls.
Three Riven Cosmic Series diaphragm mouth calls in white, black, and blue are displayed on a large brown antler—ideal for elk hunting—with blurred natural surroundings in the background.
Outdoors, a person holds fan-shaped black and white feathers toward the camera with blurred antlers and forest behind—an ideal setting for testing Riven's Cosmic Series elk calls or practicing with a diaphragm mouth call.
A person in camouflage holds out a blue and white Riven Cosmic Series diaphragm mouth call toward the camera outdoors, with trees and sunlight blurred in the background.
A Riven Cosmic Series brown leather pouch sits on a wood surface with a dark, branch-like pattern. Three metallic items peek out, ideal for elk hunting combos or storing diaphragm mouth calls.
SKU: 65275

Cosmic Series

Sale price$32.99

The all new Cosmic Series Combo Pack by RIVEN truly withstands the test of time. These calls are durable yet extremely versatile. They create a full range of elk vocalizations, including Cow, Calf, Bull, Bugles, Chuckles, Screams, Estrus Buzzing, Mews and more. This combo pack includes the Comet, Elkasus, and RS2 small domed diaphragms and a carry case. The Small dome makes for the perfect mouth placement anytime. The perfect all in one combo pack for elk hunting and calling.

VERSATILE: The Cosmic Series Combo Pack creates a full range of elk vocalizations, including Cow, Calf, Bull, Bugles, Chuckles, Screams, Estrus Buzzing, Mews and more.
INCLUDES: This combo pack includes the Comet, Elkasus, and RS2 small domed diaphragms and a carry case.
PERFECT PLACEMENT: The Small dome makes for the perfect mouth placement anytime.
TOP QUALITY tape and latex for a long lasting season.
HAND BUILT in the U.S.A to provide the best experience in the woods.
DURABLE Clamshell case for protection and pack storage.

WarningWARNING: Cancer and Reproductive Harm: Prop 65
In stock
The Riven Cosmic Series Bundle includes three adhesive patches with black, blue, and white arrow designs and center cutouts for medical devices—ideal for elk hunting fans or diaphragm call users.

Dome for easier use

Adult Standard Industry Size

Combo Pack Consisting of Comet, Elkasus, and RS2 small domed diaphragms.

Durable Tape
"Arm yourself with ultimate calling confidence with this combo pack! It’s truly a game changer offering callers the right mix of range, volumes & diversity any elk hunter seeks."

Beau Brooks--World Elk Calling Champion

Elk Vocalizations

ELK VOCALIZATIONS

The Full Spectrum of Elk Sounds

Mouth Call

Frame Style

Domed

Elk Footprint

Elky

Tastes Like Elk

Retail packaging for the Riven Cosmic Series Bundle showcases three labeled diaphragm elk calls—COMET (black), ELKASUS (white), and RS2 (black on white)—set against a cosmic backdrop, ideal for elk hunting enthusiasts.
Tonal Range

Calling Hacks

Cosmic Series Sound File

The Full Spectrum of Elk Sounds

Listen Now

Customer Reviews

Based on 5 reviews
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G
GJB
Excellent!

Just to be plain and simple they work very well and easy to use! Called I. Several elk no problem and they provided a great range of tones and easy to switch between! Highly recommended

P
Paul Camacho

Great quality

A
Aaron Lindekugel
Outstanding

Best reeds on the market.

B
Broc Everley
Great sounds effortlessly

Calls all do as stated . Good fit and feel. Looking forward to putting them to the test

S
Sean Keenan
Hands down the best calls

I’ve been searching for a mouth call for many years and I have found that Riven is the best call. The call has so much range allowing a hunter to address any call situation. Beau and team are incredible! Thanks for taking my game to the next level!

Anatomy of a Diaphram Call

What's your calling style?

Mouth Call Selector

Use the chart below to select the correct mouth call based on your calling style and needs. Hunt Riven™

*
HAS DOME
ELK VOCALIZATIONS
TONAL RANGE
BLACK ICE

No

Bugling, Chuckling and Screams

Low, Medium and High

RS1

Yes

Bull Sounds, Cow and Calf Vocalizations

Low to Medium

ROSIE

Yes

Cow and Calf Cries

Low and High

SINGLE LADY

No

Cow and Calf Cries. Estrus “Whines” or “Cries”

Superior Tonal Range

STRATUM

No

Bull, Cow and Calf Vocalizations

Low, Medium and High

TREMOR

Yes

Bugling, Chuckling and Screams. Cow & Calf Sounds

Low, Medium and High

Mouth Call Care

When it comes to mouth calls, their life span is known to be short, but they can have the ability to last with proper care. The key is how you take care of them. There are multiple ways to care for your mouth call. We recommend the following tactics to help prolong the life of your calls.

  • Keep them out of the Sun
  • Store in refrigerator, especially in the off-season.
  • Avoid areas with high exposure to heat such as glove box or center console
  • Utilize multiple calls to disperse stress

    UV rays might be one of the harshest elements when it comes to a mouth calls lifespan. Exposing your mouth call to UV can vaporize the latex and cause it to break down 10x faster than normal wear and tear. We recommend you DO NOT store your mouth calls in areas such as:
  • On the dash of the truck
  • On a table or windowsill
  • Any areas with high exposure to heat

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