2.5 mm black.
This line is PHENOMENAL!
After decades of being a confirmed paracord user, I recently purchased this line as an "exploratory buy", reading reviews, on line searches yada yada yada...so pleased with the quality that I came back, bought 200' more, and am waiting for Danielle to email me when the 300' spool I requested is ready. Next will be the line tensioner blocks when they are ready.
Basically this stuff is so good, that for me, it's bye bye Atwood and MSR...HELLO LAWSON!

No exaggeration in the name Glowire. With a headlamp at night the cord lights up like LED string lights. We use the 2.5mm on our tents which is over kill so I'm going switch the 2.5mm over to our tarps and order some 2mm yellow for our tents.

I have been teaching wilderness survival for close to 10 years and this is the stuff I recommend to my students. 550 cord has stretch so I prefer the Lawson glow wire for tarp ridge lines and tie-outs. 550 and Bankline have their place but Lawson Glow Wire is my go-to for the above uses.

Love this stuff. I recently found out about this stuff but was not sure of it's claims. It is in pitch black darkness when this stuff really shines. It even glows with the weaker red light that you have on your head torch. Even though it is a bit more expensive for us in Australia, I will be buying this stuff in the future and forgetting about paracord. Usually doing Prusik knots with small cordage is problematic, but with this stuff there is a little bit of fiddling around but way less than others.

Lawson products are great and I don’t ever want to use any other cordage! USA made, strong, light, super reflective, ends melt well, color selection! Great for my guy lines, pull tabs, lashing, hanging, etc.

Just buy some...and spread the word!

Excellent product (I got 2mm) and superb customer service.

Just started my 4th season of high country mule deer Archery hunting. I've been using the same 2.5mm line on all my tents/tarps/tipis for all 4 seasons. The only reason I bought more is I found more uses for the glow-wire and I bought another tent. Outstanding gear! Its the only cord I trust to last 10 miles back in high places. Thank you Lawson Equipment.

This stuff rocks! I don't like using anything else.

Easy to tie, easy to untie, super reflective, does not stretch, AND with shipping to Canada it costs less per foot than the inferior reflective cord sold at MEC.

11/10 customer service as well.

LOVE this stuff!
I am an active Boy Scouts of America leader across all levels of the program.
I use it to make special neckerchief slides, water bottle holders, and our Troops' and Crew's tents and dining flies all have glowire guy lines for safety.
I am a knot guy - it ties well and is a great value for it's cost per foot.
It is simply the best that I have found.
It would be cool to post some of our organization's photos shot with our tents and flies set up …..

Weather can be very intense when winter camping in Svalbard at 78° north. This cord has kept my tent safe in the strongest winds and if a polar bear decides to check us out I guess the cord can be used for a true polar bear hogtie as well.
All my guylines are replaced with 2mm glowire. For safety and no tangles.

Extremely strong. Reflectiveness is amazing. Can't wait to start using in the bush. I'll be back to update soon.

I have ordered this cord again and again. Whenever I have a new shelter, I pick this up. Lights up my tarps and tents in the night and stops my kids from killing themselves running around at night. When I tie my bear bag up in the middle of the night I turn around and see my shelter shining in the distance, which is a lot better than trying to find it in the dark with me being tired. Love this stuff.

Great stuff. In addition to glowing very bright when light hits it at night, I think a lot of people don't notice that because it is a little stiff, it really resists tangling.

Bought the black glowire and bar tensioners for my tarp, and they work exceptionally well together. I've lost my tent/hammock in the woods before, and this stuff glows like a runway landing strip. Good stuff. And strong. And light weight. Yeah, you need this.

I use 2mm & 3mm (hammock tarp or tent, dependes & additional larger rain tarp). Great low stretch cord. Simple quick release trucker hitches hold well. VERY visible at night if lit up by a light.

This is everything one can expect from cord to be used as a guy line:
Doesn't stretch a bit, works with LineLoc3 and doesn't slip when wet (nor does it absorb a lot of water), and how it glows at dark... Like Mountain Lion's eyes in a pitch dark night!

Attach these to your tarp and send your enemies fleeing in terror, convinced it's a herd of these feline beasts they have fallen upon!

This is the BEST reflective cord we’ve tried! it’s all we use for our Boy Scout/ Scouts BSA / Venturing Crew. Low stretch, holds knots well, very reflective. We have it on 8 large dining flys and on our tents. When you’ve got a bunch of kids running around in the dark, reflectivity and visibility are key!

I have been using the black glowire as guy lines for my flat tarp when backpacking. I am very impressed with it. Strong, holds the knots/hitches beautifully, and is easy to work with. I have had no tangling issues, which sets it apart from other lines I have used. I recommend it and would not hesitate to use it with future shelter set ups.

Great cord. I use the 2mm and 3mm.

Best reflective cord made.