Our advice is to use a weight that is approximately 10% of your body weight. If your weight is somewhere in between the possible choices, we recommend rounding up to the nearest weight or selecting the lower weight (e.g. if your body weight is 65kg, we recommend buying the 7kg blanket; if your body weight is 60kg we recommend buying the 5kg blanket). For any clarification, please contact our experts at info@heynight.it or by calling them at +39 3289172221.