The pouch is water resistant,but it is not waterproof.
The straps can be threaded through the loops on the back for a tight fit on the belt or any combination of wear options and belt sizes. There’s a loop on top.
This Premium Quality Pouch is made with 1000 denier waterproof cordura nylon ,with MOLLE attachments,double webbing molle belts behind, and extra strong buckles.