A warming device includes a clinical garment having an inside surface supporting one or more convective apparatuses disposed to warm a patient perioperatively. The warming device may include an upper body convective apparatus supported on the inside of the clinical garment between its sleeves. The construction of the upper body convective apparatus includes pulling elements that draw folded components of the apparatus from sleeves of the clinical garment when pulled. The warming device may include a multi-section convective apparatus disposed longitudinally in a lower portion of the clinical garment and having separately inflatable sections, each for enabling a particular mode of warming. The construction of the multi-section convective apparatus includes a therapeutic warming section with an inlet port positioned for convenient and safe access when the lower portion of the warming device is disposed to drape over the lower limbs of a person while the therapeutic warming section is being operated.