https://www.ultralightoutdoorgear.co.uk/equipment-c3/insect-protection-c16/headnets-c23 (though is this was laying on your face they could bite you through it still) or if you have lots of money and weight is less of an issue
https://www.ultralightoutdoorgear.co.uk/equipment-c3/tents-shelters-c25/bivi-bags-c41/escape-pod-1p-bivy-p7155
Head nets look good. But would probably lie flat against the face while sleeping, which is not so useful?
@Marron started
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https://www.ultralightoutdoorgear.co.uk/equipment-c3/insect-protection-c16/headnets-c23
(though is this was laying on your face they could bite you through it still)
or if you have lots of money and weight is less of an issue
https://www.ultralightoutdoorgear.co.uk/equipment-c3/tents-shelters-c25/bivi-bags-c41/escape-pod-1p-bivy-p7155