[header] How to stretch leather boots [title] Fill a resealable plastic bag with water. [step] Fill roughly one-third to one-half of the bag with water. Squeeze out as much air as possible before sealing completely. 
[substeps] To remove the air, seal most of the bag, leaving only a small gap open in one corner. Gently squeeze the portion of the bag without water in it until the plastic sides come together.