The Nike Swift Dri-FIT Short-Sleeve Running Top pairs sweat-wicking Dri-FIT fabric with a large mesh panel across the back, so heat and moisture escape mid-run instead of building up under the fabric. An updated fit adds more room through the body, and a slightly longer length, made for a more comfortable feel over the miles. A tapered waist and curved hem keep the top in place and make it easy to layer under a jacket or vest. What Our Gearhead(R) Experts Are Saying:"I run in this through humid summer mornings, and the mesh panel actually keeps my back from feeling soaked by mile three. The extra room through the body means I'm not tugging at the hem every few minutes as I did with the older, tighter fit."