Mine Protection Overalls (Jo, Bert, and Hinks' Gear)

Thick canvas overalls and reinforced gloves (though gloves not explicitly mentioned in source) forming protective gear worn by Jo Grant, Bert Haynes, and Dave Hinks while working at the Llanfairfach Colliery. The gear consists of heavy-duty twill/canvas suits reinforced at high-abrasion points (knees, elbows, collars) and stiffens with accumulated coal dust. Unique features include: 1) Faint phosphorescent smears on the overalls from the alien experiment's glow; 2) Bert's rolled sleeves revealing frayed hems where an original owner's name was scratched off; 3) Baggy fit despite shared use; 4) Heavy material that slows movement in tight mine shafts. The ensemble protects miners from abrasive surfaces and airborne particulates while working in unstable underground conditions. First compromised by alien contamination during a routine descent operation.