a spacer for use in a mobile device fills the space between a component assembly and a housing . the spacer includes a layer of compressible material for insertion between the component assembly and the housing . a plurality of compressible features are provided on a face of the layer . upon insertion of the component assembly and assembly of the housing , the compressible features are compressed to fill a gap between the component assembly and the housing without over - compressing the main body of the spacer , allowing the body of the spacer to cushion any subsequent impact to the mobile device .