Very hard to find. 225 FROSTED VINYL BLOOMERS:
These are designed to prevent urine leaks in a sitting person, e.g., when travelling by car). A soft and sturdy vinyl boxer is great for night time too and those who do not like elastics at the thigh.
Soft and sturdy fabric elastics rest against the skin.
The sides are heat sealed. Sizes (approximately measures):
Small (S) waist 18" to 38" (61cm to 78cm), hips maximum 36" (91cm).
Medium (M) with waist 24" to 50" (74cm to 96cm) and hips maximum 41" (104cm).
Large (L) with waist 26" to 52" (82cm to 127cm) and hips maximum 52" (127cm).