Embodiments of insulation materials, and methods of their formation, are disclosed herein. In some embodiments, an insulating material may include a stretchable scrim layer, a face layer, and an insulation layer disposed between the scrim layer and the face layer. First and second seams may couple the stretchable scrim layer, the insulation layer, and the face layer, and a length of the face material between the first and second seams is greater than a length of the stretchable scrim between the first and second seams. Other embodiments may be disclosed and/or claimed.