I am the proud dad of a very happy 15 1/2 month old. My wife and I both use the large-size hand-woven wrap from the German company Didymos (didymos.com), to which I assign a good deal of credit for our son's contentment and emotional security. It's a single piece on non-elastic organic cotton, about 8 feet long. The ends are finished at about 45 degrees for ease of tying. It comes with a booklet with instructions for multiple front, back, and side carries--find the ones that work for you. It enables 100% secure hands-free travel and close contact (even skin-skin, if you like). We have carried our son up the Onion Valley trail in the eastern Sierra Nevada, the Table Rock loop at Grafton Notch State Park in Maine (involving scrambling and hand-over-hand climbing), and were riding the bus with him at 5 days old, if that gives you any idea of the security of this wrap. The accompanying booklet also contains useful infant posture information. Wraps like this naturally favour the anatomically correct frog-leg carrying position--avoid carrying infants face-out (especially at the earliest stages): dangling legs cause hip damage. Used correctly, the only real discomfort to manage is sharing body-heat, but even that can be an advantage, and the emotional and psychological benefits to both child and parent heavily outweigh this, in my experience. Especially in cold weather (Montréal winters can be severe), you know intimately if your child is at a comfortable temperature. We have coupled it with a special tie-on jacket for infants in carriers. The wrap can also be used as a hammock for the little one! The best $200 (Canadian) that we ever spent.