Easy to use and put on: NO WRAPPING INVOLVED. 6 positions to conveniently carry baby & toddlers from 8 lbs to 35 lbs 100% soft natural cotton with unique one-way stretch Unique HYBRID double-loop design holds baby securely and evenly distributes weight across back and both shoulders. Washer & dryer safe Creates ideal environment for preemies and babies with special needs (consult doctor) & provides privacy while nursing Recommended by Lactation Specialists & Paediatricians, Chiropractors, Physical & Occupational Therapists. Instructional manual included