The two questions the sheets disagree on
One-piece or two-piece? Novice groups frequently allow a zip-together two-piece and sometimes allow textile; intermediate and advanced groups more often want a one-piece leather suit. We do not list a one-piece suit, and that is an honest gap in this page rather than a judgement — we have not sourced spec pages for any, and we will not rank a product we have not read. The two-piece route on this page is the GP Plus R V4 jacket and the Missile V3 Airflow pant, which share the waist connection zip. If your organization’s sheet says one-piece for the group you are entering, buy or rent a suit and treat this page as the list for everything else.
Back protector in the jacket, or worn under it? This is the one that catches people out, because it is easy to assume a premium leather jacket includes one. The GP Plus R V4 does not: Alpinestars ships it with shoulder and elbow armor and leaves the back and split-chest protector pocketsempty. Some sheets accept a back protector worn as a separate garment, some want it in the jacket, and a few want a specific EN 1621-2 level. Either fill the pocket or buy a protector you wear, which is what our armored base layer ranking covers, and check the clause on the sheet before you choose which.
Where the airbag sits in all of this
An airbag vest is the newest piece of this list and the one changing fastest. It is not on this page because any sheet we read requires it — we are not claiming that, and most US club sheets do not. It is here because the published coverage is the largest single protection upgrade available to a track rider who already has leathers: the Tech-Air 5 Plasma covers chest, ribs, back and shoulders, weighs 1,530 g, arms itself when you zip the vest, and goes under a jacket rather than over it.
Two honest notes. Alpinestars certifies this bag to EN 1621-4:2013 Level 1, and the cheaper over-jacket Tech-Air 3 V2 publishes Level 2 for chest and back — so the premium here buys coverage, weight and wearability, not the higher attenuation figure. And it is certified for up to six deployments before replacement, which is a long-term cost nobody quotes at the till. Our airbag vest ranking works through the whole category, and airbag vest vs back protector is the right page if you are deciding between the two rather than buying both.
One compatibility detail that matters on a track kit specifically: an under-jacket airbag needs the jacket to have room for it. The GP Plus R V4 is Tech-Air 5 and Tech-Air 3 Ready, which means Alpinestars has cut it to take the vest without a size change. A close-fitting race jacket that is not airbag-ready will not, and finding that out after buying both is an expensive afternoon.
What the helmet pick is really about
Tech sheets usually ask for a full-face helmet with a current certification, and some ask for Snell by name. The X-Fifteen is our pick because it is the only helmet in our registry that publishes DOT, ECE 22.06 and Snell M2025R at once — and M2025R is the Snell program written for helmets that also have to meet ECE R 22-06, which is why it can hold both. The full list of Snell-rated helmets we track is short, and best helmets for track days ranks the whole field including the cheaper Snell route.
The less obvious reason it is the pick: the X-Fifteen’s aerodynamics and airflow are tuned for a tucked position, with seven intakes and six exhausts, and Shoei cites a 6.1% drag reduction over the helmet it replaced. That is a real advantage on a track and an active disadvantage sitting upright in traffic, which is why we do not recommend it as a one-helmet solution anywhere else on this site. If a track day is a once-a-season thing and this will be your only helmet, buy the best full-face for your riding instead and check its certification against the sheet.
What we left out, and why
A one-piece leather suit. The single most commonly required item for intermediate and advanced groups, and we have none in the registry. Named as a gap above rather than filled with a guess.
Rental gear. Most track-day organizations and many schools rent suits, and for a first day that is frequently the correct financial answer — a rented suit that fits beats an owned suit bought in a hurry. We have no product to rank there, but we would rather say it than sell you leathers for a day you might not repeat.
A chest protector, specifically. The GP Plus R V4 has a split-chest protector pocket and the airbag on this page covers the chest, so there are two routes. We do not list a standalone chest protector, and the armored vests on our base-layer page cover chest and back together rather than chest alone.
Leathers from the European race houses. Riders ask about Dainese, RST, Spidi and Held constantly. Our searches on the check dates for this and our racing gloves page did not return US listings a reader could buy in their size, which is the same reason those names are absent there.
Anything claiming “track ready” without a clause. “Track ready” is not a certification and no test house issues it. Every piece on this page publishes an actual standard — EN 17092-3 Class AA for the leathers, EN 13594:2015 Level 1 KP for the gloves, EN 13634:2017 for the boots, EN 1621-4:2013 Level 1 for the airbag — and those are the lines worth reading off a sheet.