Here is a great alternative to those bulky binocular harnesses. Approximate cost is less than $5.
Issue 1, Summer 1984, page 6: “The Aleut Baidarka - Sea Kayaker
How to Make Your Own DIY BinoHarness for Free
The Terrain Plateau Bino Case with Harness is an easy-open pouch and harness system designed to protect your binoculars and keep them right where you
Allen Company Terrain Plateau Bino Case with Harness by Allen, Mossy Oak Break-Up Country Camo
Great Budget Bino Harness, not the brand you would expect
Great Budget Bino Harness, not the brand you would expect
Paddler Magazine, PDF, Kayak
Rick Young Ultralight Binocular Harness
Bino Harness Essentials for HUNTING AND SURVIVAL
DIY – Binocular Harness – By Kurt Holmes - Backcountry Hunters and Anglers
Texas Fish & Game Magazine - Shooting & Firearms
DIY binocular harness quick detach
$30 DIY Binocular Chest Harness - Now You Try