Smartwool PhD HyFi Divide Half Zip - Men's Longer length for tuckability HyFi Double Jersey knit front panel combined with Lightweight NTS back, bottom, and side panels 13" (34 cm) offset zipper with semi-locking logo slider Secure angled zip chest pocket, logo zipper extension and Durawelt grommet for media cord routing Low-profile in-seam thumbholes at cuffs