More than £2,000 worth of cigarettes were stolen from the Green Road Service Station in Southsea around 6.30am on Friday October 23.
He was white with a medium build and slightly overweight. He was said to be wearing an unzipped dark green waterproof coat with the hood up, dirty light grey jeans with a tan belt, a stripy blue top and black shoes.
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The witness also said he had a black face mask on, a white glove on his left hand and a black glove on his right hand as well as a black ‘man bag’.
It was also said he was carrying a single blue and yellow children’s duvet cover with characters from the TV programme Paw Patrol on it.
A police spokesman said: ‘We’re appealing for witnesses after more than £2,000 worth of cigarettes were stolen from the Green Road Service Station in Southsea.
‘This happened at around 6.30am on October 23.
‘We’ve been provided with a very detailed description of the man responsible, so please read closely and let us know if you know this person, or saw him in the area.’
Anyone with information about the man or the crime is asked to contact police on 101 quoting 44200411708.
Alternatively call Crimestoppers anonymously on 0800 555 111 or fill out an anonymous online form at crimestoppers-uk.org