The GORUCK Rucker is designed and built to be a “gym on your back”. It currently comes in 3 sizes; 15L, 20L, & 25L.
This FITREP is on the 20L Rucker I own and have used on multiple rucks, GORUCK Events, and Rucksack PT sessions.
The GORUCK Rucker 2.0 is full of features that make it my favorite Rucksack for Strength Training and Ruck Training. Here is my list of features that make this Ruck worth having:

Made in the USA!
Many of the GORUCK products are made in the USA and come with a lifetime warranty!

Ruck Plate Pockets
Ruck Plates allow you to add weight without the bulk, making it easier to do PT. The Rucker has two pockets that fit Ruck Plats securely and holds them in place during your workout.

YKK Zippers
These high quality zippers also have glove friendly silent zipper pulls to make getting into the Rucker very easy.
Yes, even the Rucksacks have accessories!
Padded Hip Belt
Hip belts help you carry more of the load on your hips making it more comfortable on long rucks.
Reflective Leg Bands
Reflective leg bands help you be more visible while rucking.