The FREE, beginner friendly Speedy Pants sewing pattern has two styles of modest, gender neutral undies - boxers and briefs.
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Waves and Wild speedy pants - Sewing à la carte
Waves and Wild speedy pants - Sewing à la carte
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So, Zo': Free Pattern Friday: Kids' Speedy Pants
So, Zo': Free Pattern Friday: Kids' Speedy Pants (Boxers AND Briefs Edition)