The Nested Bean Zen Sack Classic has a lightly weighted area on the chest that feels like Mom's palm resting there. The benefits of touch include comfort, security and love and the pressure from the Zen Sack's lightly weighted pad and plush upper panel mimics that touch.    Features: 

• Luxuriously soft to the touch 
• Roomy design is healthy for the hips 
• Lightly-weighted top layer and center soothes, mimics the gentle pressure of an adult's reassuring palm 
• Adjustable shoulder straps ensure a perfect fit and allows the sack to grow with your child 
• Complete side opening and 2-way zipper opens flat for easier changing with minimal movement while your infant sleeps 
• Eliminates the need for loose blankets, creating a safer sleeping space 
• Small fits children 0-6 months 
• Medium fits children 6-12 months 
• 100% natural Peruvian cotton with light poly-fiber filling 
• Machine wash and dry