The Tactical Field Binder is made of tough tan Polydura and rust resistant metals. The 5 5/8 in x 7 3/4 in binder holds all Rite in the Rain Tactical Loose Leaf styles. Loose Leaf insert sheets sold separately.
The holes fit the Franklin Covey "Compact" size punch.
If you have a 6 ring A5 wallet or papers then this is more than likely to be the same format - the two groups of three rings is fairly ubiquitous and this uses the same standard - this means you can put in your existing sheets from an organiser or whatever.
The Rite in the Rain Field Binder is made from tough plastic with a quality ring binding unit.