Winston wrenched his body out of bed — naked, for a member of the Outer Party received only 3,000 clothing coupons annually, and a suit of pyjamas was 600 — and seized a dingy singlet and a pair of shorts that were lying across a chair.
A singlet is a plain sleeveless piece of underwear which is worn on the upper half of the body. He was wearing a blue silk singlet and boxer shorts. = vest, undershirt. a piece of clothing that you wear for sport which covers the top part of your body but not your arms