and the internal heating parts are made of spandex

Extended silicone nose pads to help stay in place on small bridges

gallery-wrapped art piece

A multidirectional point of view hat

Storage pocket for cord

NEW Vision Training Tool Visual Convergence Training Tool Front Sight Correction Sight Focusing Training Vision Correction Tool pants and the internal heating partsNEW Vision Training Tool Visual Convergence Training Tool Front Sight Correction Sight Focusing Training Vision Correction Tool Helps improve convergence insufficiency and strength sight focusing. Effectively promote convergence to corrects weak sight and strabismus. Light weight and compact size is easy to use and carry outdoor. Professional visual function correction training equipment. Made of quality beads and line, durable and convenient to use.