From Fehr Trade:
A running short designed for lightweight wovens or mesh fabrics with three optional pockets, curved seamlines, bound hem, and elastic waist. An optional runderwear brief or thong can be attached at the waistband or worn separately.
Intermediate sewing skills are required for this pattern - some experience with sewing knits is expected.
The shorts pattern is drafted with some ease and can be sewn with woven or stretch fabric. The runderwear pattern requires 4-way stretch jersey fabric with good recovery - it is drafted with 10% negative ease (the finished garment will be 90% of body measurements). The shorts inseam is 5cm (2in).