Do not knot but tightentwo loops are tightened crosswise and the carrybaby sling is finished without knots without stress whether large or small whether slightly or powerfully built the back friendly carrybaby sling with its patented zipping system can be adapted without problem to any parent and child size detailed instructions with pictures are enclosed so itrsquos easy to learn how to tie your carrybabyamazonas carrybabys are made of 100 37 cotton so they are breathable and