Morph Sleek Geometric Pattern Ballstretcher Smoosh Black from Oxballs. Morph is a thick squishy tube of pure silicone designed to stretch your sack low. The soft material and curve shape morph to fit your nuts and cling to you like a second skin. Each end of Morph is tipped with a blubbery rim that gently rests on your sack and pushes your balls down for an all day stretch. The outside of Morph is covered in a cyber-sleek geometric pattern that keeps its shape and strengthens any stress points to prevent tearing.