Overview The Session Quarter Zip is the layer you pull over a singlet on a 50-degree morning and pull off by mile three. A Tencel-blended 200 gsm fabric (33% Tencel, 33% Poly, 31% Nylon, 3% Elastane) with Nilit Cooling yarn that feels like a sweatshirt and dries like a tech tee, with a zipper at the collar that vents heat on demand and a close cut that layers cleanly under a shell. The hare sits embroidered at the chest, quiet as usual. For October on the Charles, April in Toronto, the shoulder seasons when you're never quite dressed right at the start. A women's silhouette in the same Session Tencel blend as the men's — same vented collar, same proper-noun fabric vocabulary, same October-on-the-Charles use case. Details Best for: October tempo runs in 40-50 FShoulder-season base-buildingWarm-ups before a cold-weather workoutMid-layer under a rain shellPost-run café sits, reads street, performs on the runTravel kit for a cool-weather race weekend Specs: 33% Tencel / 33% Polyester / 31% Nylon / 3% Elastane, 200 gsmNilit Cooling fibres for temperature regulationQuarter-zip collar vents heat on demandClose cut sits clean under shellsFlatlock seams for anti-chafe wearEmbroidered hare at the chest Colourways: Black Sizing: XS / S / M / L / XL Pairs with Session Pants and Merino Tube Socks for a shoulder-season warm-up; layer over a Brighton Base Layer on the colder mornings. Materials & Care Designed in Boston. Machine wash cold with similar colours, inside out to protect the embroidered hare. Hang dry or tumble dry on low heat. Do not iron directly on prints or logos. Do not dry clean. Follow the care label on the garment for the last word. Treated well, Tracksmith's performance-poly pieces cycle through years of high-mileage training. Bundle & Save Build a bundle and save up to 10% off. Shop Bundle Builder
