Standard paracord based ranger beads (pace counters) aren’t exactly heavy, but… They are heavier than they need to be. A long time friend of mine and US Army veteran developed the Ultra Light Micro Ranger Beads that weigh in as just 2.27 grams compared to about 5 grams for a regular ranger beads.
These ranger beads makes use of smaller beads and lighter cord. They are small enough to make a difference but large enough to still be used with gloves. I have had two sets of these for almost 2 years. There have been zero issues with beads slipping or breaking. In fact, the beads grip this cord better than a lot of the full size ranger beads.
These are small and light but easy to use and durable. They are also made by a veteran right here in the USA and affordable at $5.35 shipped each. There are several bead and cordage options and there may be discounts for bulk orders. These are only sold on Ebay at the moment.
Check out the original Ultra Light Micro Ranger Beads on Ebay.