Lycra Spacial Body Sacks are fun, therapeutic sacks constructed from 4 way stretch lycra. The Lycra body sack is a movement, proprioceptive , tactile and deep pressure experience like no other. To use the Spacial Body Sack is as easy as…. Just climb in and watch your body make shapes you never thought possible. Perfect for any child with sensory processing disorders sensory integration dysfunction. Using the Spacial Body Sack will allow them to work on position in space skills. They must kinesthetically feel what their body's are doing and how they are coordinating their body movement.