PROKNOT summarizes basic outdoor knots on six plastic cards that weigh less than an ounce for the set. -- Backpacker Magazine, September, 2000
Waterproof and durable. --Outside Magazine, June 1999
From the Publisher
Even if you already have a good knot book, the PROKNOT cards make a great field reference that is waterproof and nearly indestrucable! These cards are used for training by the US Departmant of Defense, Municipal Fire Departments, Boy Scout Troops, and Search and Rescue groups. Even arborist companies (for their tree climbers) use them! Being able to take these little cards out into the elements to refer to them when you need to know that knot is a real benefit.