EASE OF USE
The Green Guru 36L High Roller Backpack pannier’s Quick Mount mounting system consists of two simple, non-locking, durable metal hooks that hang from the top of the bike rack and lower metal hook with an adjustable strap and bungee that attaches to the bottom of the rack. Our tester found that the best method to attach is to clip the bottom hook first then the top. To detach, lift from the top first than detach the lower hook. 

VERSATILITY
The Green Guru 36L High Roller Backpack pannier comes with a stashable backpack harness that fits conveniently inside a Velcro-sealed compartment. Converting from pannier to backpack and back is fairly quick and easy. However carrying it backpack-style is not very comfortable for longer distances when carrying heavy loads. 

The Green Guru 36L High Roller Backpack pannier fit equally well on a Civia Hyland and a Trek District rack and works well for both general commuting and light shopping runs. However the upper metal attaching hooks are riveted to the pannier and are not adjustable forward and backward so may not fit all bike racks.

DURABILITY
The Green Guru 36L High Roller Backpack pannier is made with recycled bicycle inner tubes and a durable ten-ounce vinyl waterproof tarp material with black nylon Cordura on the ends and bottom. Internal structure is constructed using HDPE plastic framesheet. Cleaning the pannier is very easy and requires only a damp or wet washcloth. The Green Guru 36L High Roller Backpack pannier mounting system hardware is vinyl coated metal and the clips that secure the flap and attach to the bottom hook are a very heavy duty plastic.

WEATHER RESISTANCE
The Green Guru 36L High Roller Backpack pannier has a TPU laminated nylon liner and a weather-resistant envelope-top closure that is secured in place with strip of heavy Velcro making it waterproof.   

While our tester did not encounter rain during her testing period, she did drench it with a garden hose to confirm waterproofness.  

FEATURES
The Green Guru 36L High Roller Backpack pannier is very simplistic in design. Its envelope-top design and sturdy plastic clip with adjustable webbing compression strap allows for moderate flexibility in cargo capacity. Our tester successfully carried lunch, clothing, shoes and a fifteen-inch IBM ThinkPad inside the main compartment. However the Green Guru 36L High Roller Backpack pannier does not have a separate laptop sleeve. 

The Green Guru 36L High Roller Backpack pannier comes with a stashable backpack harness that fits conveniently inside a Velcro-sealed compartment. Converting from pannier to backpack and back is fairly quick and easy. However carrying it backpack-style is not very comfortable for longer distances when carrying heavy loads. A webbing grab-handle is moderately comfortable as long as the cyclist is not carrying heavier loads. 

A set of outer side pockets can hold items like a bike lock or water bottles. However the pockets are not stretchy or very deep. During the testing period, our tester rode over a pot hole in the bike path and her bike lock fell out. 

Each outer side pocket also contains a wide webbing loop that can hold a blinkie light. 

Reflective elements are generous and include a highly-reflective simple triangle on the front and reflective stripes on the blinkie light webbing loops on both ends of the pannier.