Retention pocket for clothing articles

A pocket on a shirt configured to releasably secure an object within an interior volume thereof wherein the pocket comprises:

• an outer wall, said outer wall being adjacent a body of the article of clothing having a void therebetween forming the interior volume, said outer wall having opposing lateral edges, said outer wall having a bottom edge, said opposing lateral edges and said bottom edge being contiguously formed, wherein the pocket has an opening opposite said bottom edge, said opening providing access to said interior volume, said opening being defined by an upper peripheral edge;
• a first retention seam member, said first retention seam member being present along said upper peripheral edge, said first retention seam member having a first end and a second end, said first retention seam member being manufactured from an elastic material, said first retention seam member configured to bias said opening against said body;
• an upper flap portion, said upper flap portion being vertically adjacent the upper peripheral edge of said outer wall, said upper flap portion having an upper edge and a pair of opposing lateral edges, said upper flap portion further having a lower peripheral edge configured to extend below said upper peripheral edge of said outer wall;
• and
• a second retention seam member, said second retention seam member being secured to said upper flap portion along said lower peripheral edge thereof, said second retention member having a first end and a second end, said second retention member configured to bias the lower peripheral edge of said upper flap portion against said outer wall.