fuzziness on the inside of the collar

which is not only water-resistant but also highly breathable

The Gamma APX is a twin shape with a difference: symmetrical nose to tail but asymmetrical edge to edge

as well as easy access to jersey pockets underneath

Two-layer construction Constructed with a two-layer rib knit for extra warmth

Arc'teryx Ossa Overshirt M Size:L fuzziness on the inside ofSummer sun, meet your match An essential midlayer for high exposure hikes, this button up overshirt leverages UPF 50+ material for sun protection Easy to layer over a tee or tank, its textured nylon ripstop minimizes skin sticking in hot conditions The pop up collar protects your neck when the sun's beating down.