diff --git a/src/geometry.rs b/src/geometry.rs
index 0cce49e..f2f6d89 100644
--- a/src/geometry.rs
+++ b/src/geometry.rs
@@ -5,7 +5,7 @@ use geo::{Polygon, LineString, Point, point, Closest};
 use geo::algorithm::closest_point::ClosestPoint;
 
 ///Trait for a Geometry object - all forms of geometry must implement these traits to be used
-pub trait Geometry: GeometryInput {
+pub trait Geometry {
 
     type InputFileFormat: InputFile + Clone;
 
@@ -45,15 +45,11 @@ pub struct Mesh0D {
     pub energy_barrier_thickness: f64,
 }
 
-impl GeometryInput for Mesh0D {
-    type GeometryInput = Mesh0DInput;
-}
-
 impl Geometry for Mesh0D {
 
     type InputFileFormat = Input0D;
 
-    fn new(input: &<Self as GeometryInput>::GeometryInput) -> Mesh0D {
+    fn new(input: &<<Self as Geometry>::InputFileFormat as GeometryInput>::GeometryInput) -> Mesh0D {
 
         let length_unit: f64 = match input.length_unit.as_str() {
             "MICRON" => MICRON,
@@ -139,10 +135,6 @@ pub struct Mesh1D {
     pub bottom_energy_barrier_thickness: f64,
 }
 
-impl GeometryInput for Mesh1D {
-    type GeometryInput = Mesh1DInput;
-}
-
 impl Geometry for Mesh1D {
 
     type InputFileFormat = input::Input1D;
@@ -326,16 +318,12 @@ impl Mesh2D {
     }
 }
 
-impl GeometryInput for Mesh2D {
-    type GeometryInput = Mesh2DInput;
-}
-
 impl Geometry for Mesh2D {
 
     type InputFileFormat = Input2D;
 
     /// Constructor for Mesh2D object from geometry_input.
-    fn new(geometry_input: &<Self as GeometryInput>::GeometryInput) -> Mesh2D {
+    fn new(geometry_input: &<<Self as Geometry>::InputFileFormat as GeometryInput>::GeometryInput) -> Mesh2D {
 
         let triangles = geometry_input.triangles.clone();
         let material_boundary_points = geometry_input.material_boundary_points.clone();
diff --git a/src/input.rs b/src/input.rs
index fe88e06..561d03c 100644
--- a/src/input.rs
+++ b/src/input.rs
@@ -172,7 +172,7 @@ pub struct Options {
 }
 
 pub fn input<T: Geometry>(input_file: String) -> (Vec<particle::ParticleInput>, material::Material<T>, Options, OutputUnits)
-where <T as Geometry>::InputFileFormat: Deserialize<'static> + 'static, <T as GeometryInput>::GeometryInput: Clone {
+where <T as Geometry>::InputFileFormat: Deserialize<'static> + 'static {
 
     //Read input file, convert to string, and open with toml
     let mut input_toml = String::new();
diff --git a/src/material.rs b/src/material.rs
index 0afbcda..a448e40 100644
--- a/src/material.rs
+++ b/src/material.rs
@@ -27,7 +27,7 @@ pub struct Material<T: Geometry> {
     pub surface_binding_model: SurfaceBindingModel,
     pub bulk_binding_model: BulkBindingModel
 }
-impl <T: Geometry + GeometryInput> Material<T> {
+impl <T: Geometry> Material<T> {
 
     pub fn new(material_parameters: &MaterialParameters, geometry_input: &<<T as Geometry>::InputFileFormat as GeometryInput>::GeometryInput) -> Material<T> {
 
diff --git a/src/parry.rs b/src/parry.rs
index 39748d7..b69617a 100644
--- a/src/parry.rs
+++ b/src/parry.rs
@@ -12,10 +12,6 @@ pub struct InputParryBall {
     pub geometry_input: ParryBallInput,
 }
 
-impl GeometryInput for InputParryBall {
-    type GeometryInput = ParryBallInput;
-}
-
 impl InputFile for InputParryBall {
 
     fn new(string: &str) -> InputParryBall {
@@ -54,7 +50,7 @@ pub struct ParryBall {
     pub ball: Ball,
 }
 
-impl GeometryInput for ParryBall {
+impl GeometryInput for InputParryBall {
     type GeometryInput = ParryBallInput;
 }
 
@@ -62,7 +58,7 @@ impl Geometry for ParryBall {
 
     type InputFileFormat = InputParryBall;
 
-    fn new(input: &<Self as GeometryInput>::GeometryInput) -> ParryBall {
+    fn new(input: &<<Self as Geometry>::InputFileFormat as GeometryInput>::GeometryInput) -> ParryBall {
 
         let length_unit: f64 = match input.length_unit.as_str() {
             "MICRON" => MICRON,
@@ -144,10 +140,6 @@ pub struct InputParryTriMesh {
     pub geometry_input: ParryTriMeshInput,
 }
 
-impl GeometryInput for InputParryTriMesh {
-    type GeometryInput = ParryTriMeshInput;
-}
-
 impl InputFile for InputParryTriMesh {
 
     fn new(string: &str) -> InputParryTriMesh {
@@ -187,7 +179,7 @@ pub struct ParryTriMesh {
     pub boundary: AABB,
 }
 
-impl GeometryInput for ParryTriMesh {
+impl GeometryInput for InputParryTriMesh {
     type GeometryInput = ParryTriMeshInput;
 }
 
@@ -195,7 +187,7 @@ impl Geometry for ParryTriMesh {
 
     type InputFileFormat = InputParryTriMesh;
 
-    fn new(input: &<Self as GeometryInput>::GeometryInput) -> ParryTriMesh {
+    fn new(input: &<<Self as Geometry>::InputFileFormat as GeometryInput>::GeometryInput) -> ParryTriMesh {
 
         let length_unit: f64 = match input.length_unit.as_str() {
             "MICRON" => MICRON,
diff --git a/src/sphere.rs b/src/sphere.rs
index 621df69..7617788 100644
--- a/src/sphere.rs
+++ b/src/sphere.rs
@@ -8,10 +8,6 @@ pub struct InputSphere {
     pub geometry_input: sphere::SphereInput,
 }
 
-impl GeometryInput for InputSphere {
-    type GeometryInput = sphere::SphereInput;
-}
-
 impl InputFile for InputSphere {
 
     fn new(string: &str) -> InputSphere {
@@ -49,7 +45,7 @@ pub struct Sphere {
     pub energy_barrier_thickness: f64,
 }
 
-impl GeometryInput for Sphere {
+impl GeometryInput for InputSphere {
     type GeometryInput = SphereInput;
 }
 
@@ -57,7 +53,7 @@ impl Geometry for Sphere {
 
     type InputFileFormat = InputSphere;
 
-    fn new(input: &<Self as GeometryInput>::GeometryInput) -> Sphere {
+    fn new(input: &<<Self as Geometry>::InputFileFormat as GeometryInput>::GeometryInput) -> Sphere {
 
         let length_unit: f64 = match input.length_unit.as_str() {
             "MICRON" => MICRON,