A boiler suit is a one-piece garment with full-length sleeves and legs like a jumpsuit, but usually less tight-fitting. A one-piece suit avoids the potential problem of loosened soot entering the lower half of one's clothing through the gap in the middle. As the fire hole opening is only just large enough for a fit individual to negotiate, a one-piece suit also avoids the problem of the waistband snagging on the fire hole as one bends to wriggle through, or of jacket tails snagging if one has to come out backwards.
1. Boiler Suit has no gap between jacket and trousers or between lapels, and no loose jacket
2. It has a long thin pocket down the outside of the right thigh to hold long tools.
3. It usually has a front fastening extending the whole length of the front of the body up to the
throat, with no lapels.
4. It may be fastened with buttons, a zip, Velcro, or snap fasteners.
5. Boiler suits with an attached hood are available.