Helly Hansen Men's Aker Cotton Blend Flannel Check Shirt - M - Navy - Available at M&S
This cotton-blend flannel shirt from Helly Hansen can function as a comfy base layer or an overshirt. It's made in a regular fit, with a collar and button-through fastening. Darts in the back shoulders enhance mobility, while adjustable cuffs let you customise the fit. The all-over checked pattern gives a traditional look.