HALF-ZIP
JERSEYS

What the half-zip is

The half-zip jersey is the middle of the issued wardrobe: warmer than a tee, lighter than a jacket, closer-cut than either. It is what athletes train in through the cold months and wear around the stadium when a jacket is too much — the layer between the layer and the skin.

Thermal engineering has a unit for what it does. Garment insulation is measured in clo — one clo keeps a resting person comfortable at 21°C — and on that scale the half-zip class sits at 0.34, two hundredths below a thin jacket's 0.36. The ladder above puts the whole issued wardrobe on one axis: the jersey does jacket-level work.

From this series · in the archiveNike Pro Elite Team 2014 Women Half Zip JerseyA 2014 team half-zip — the oldest cut in this rail, from the cycle that built the mould.90,00 €View piece →

What the jacket cannot do is the zip. A quarter of the way open over a warm-up, closed to the chin in a cold call room, half down on the bus — the half-zip is the only garment in the kit with a thermostat.

The mid layer, explained

Layering guides put every cold-weather outfit together the same way: a wicking base against the skin, an insulating mid layer over it, a shell on top when weather demands. The half-zip is the kit's answer to the middle slot — and in athletics it usually IS the outer layer, because sessions are short and shells only come out in rain.

The cut follows the job. A high collar that closes to the chin, a zip that stops at the sternum — low enough to vent, high enough that the garment pulls on over the head and stays anchored while running. Sleeves run long, often with thumb-loops in training cuts, and the body is trim so a shell fits over it without bunching.

Fourteen of the sixteen jerseys in this archive declare elastane alongside polyester — the half-zip is a stretch knit, not a woven. It moves like a base layer and insulates like a mid, which is the whole trick.

How a jersey is built

The construction brief is stable across suppliers and decades — a 2014 Nike team half-zip and a 2026 one differ in fabric finish, not in idea.

• The knitPolyester with elastane — 14 of 16 pieces in this archive declare the blend. Stretch is structural: the jersey moves with the stride.
• The zipSternum-length — the vent. Open for effort, closed for cold, and the collar stands either way.
• The collarHigh and close, the wind seal for the neck a tee cannot offer.
• The insulation0.34 clo on the ASHRAE garment scale — two hundredths below a thin jacket, with none of the bulk.
• The cuffsLong sleeves, close cuffs, thumb-loops on training cuts — the wrist is where a mid layer leaks.
• The badgeFederation or team mark on the chest, matching the race kit of its cycle — this is issued kit, not fan wear.

From this series · in the archiveNike DSM-Firmenich Team Pro Elite 2026 Training Half Zip JerseyThe newest cycle in the rail — a 2026 pro-team training half-zip, same idea, current knit.180,00 €View piece →

The long-sleeve training shirt is the half-zip's little sibling — same knit, no collar, no zip — and teams issue both because the two-hundredths of clo between them is sometimes exactly the difference a session needs.

How to choose yours

Choosing a half-zip is choosing the workhorse — the piece that gets worn, not displayed.

• Trim, not tightThe jersey should sit close enough to go under a shell — if it fits like a hoodie, it is a size up from its job.
• Check the zip garageA good half-zip parks the zip pull in a fabric garage at the chin — the detail that separates issued kit from cheap copies.
• Match the cycleThe jersey carries its kit's year and colours — pair it with the race pieces of the same season.
• Old rails run deepLike jackets, jerseys survive their kits — this rail reaches back to 2014, further than most singlet rails can.
• Stretch is the tellA team half-zip has elastane in the tag; an all-poly one is usually a supporter piece, not an issue.
• Wear itThe half-zip is the most wearable garment in any issued set — street-ready in a way briefs and singlets never were.

From this series · in the archiveNike DSM-Firmenich Team Pro Elite 2026 Training Long Sleeves ShirtThe little sibling — a long-sleeve training shirt, same knit without the collar and zip.180,00 €View piece →

If the singlet is the trophy and the jacket is the witness, the half-zip is the tool: the garment a professional actually wore most hours of their season.