Mesh, Powertek jock shorts with removable cup. Smoke free and non-shedding pet home. Waist measurement shown in pic- abt 10” across. May fit a 5-7 year old. My son was abt 6 when he wore these. The ones we bought to replace these are CCM brand and say a YS (so it seems a youth small but they are nearly 2” wider in the waist than the ones posted here that are a “L/XL”