FirstGear Thermosuit ::

FirstGear Thermosuit

  • 120 g polyester insulation
  • Full storm-flap closures on zippers, pockets and cuffs
  • Cargo storage pockets
  • Elasticized ankle closures and adjustable waist
  • 210-denier Hypertex™
  • Five-year limited manufacturer’s warranty

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Sizing Information

FirstGear publishes a fit chart which is exclusive to this product which I’ve show below just for your information. For whatever reason, the fit chart grossly over-estimates the chest sizes for each suit size. For example, a size large jacket generally fits a person with a 44” inch chest and their chart estimates the size of the suit at 55”. If that were the case you could wear the suit and tuck a friend inside with you!

Anyway, we checked the sizing of the suits and found the fit to be just about right, and is appropriately up-sized to accomodate protective gear underneath. I tried on a large, which is my normal size and I found it would work fine for me either with or without a jacket underneath. My primary advice would be to choose the size you normally wear in men’s jackets or shirts. If you are between sizes and/or you won’t be wearing protective gear underneath, go down one size.

I found the overall height of the size Large suit to be plenty tall everywhere for my 6’ frame, so I’d characterize the cut as “generous” for height.

The suit has Velcro straps on each side of the waist so you can take up some extra room if necessary. Also, the ends of the legs are fitted with elastic to fit snugly around your ankles so even if the leg cut is a bit long on you, they won’t drag. Likewise for the sleeves… there are velcro tabs to snug down at the ends of the sleeves.

FYI, here is Firstgear’s inaccurate/misleading fit chart:

Size Chest (in) Waist (in) Sleeve (in) Inseam (in)
SM 48 40 – 42 24 31.5
MED 51 43 – 45 25 32.5
LRG 55 46 – 49 26 33.5
XL 59 49 – 53 26.5 34.5
2XL 63 51 – 57 27 34.5
3XL 67 54 – 61 27.5 34.5

Our Two Cents

The FirstGear Thermosuit is a full-body insulated suit designed to keep you warm and dry in cold weather. Wear this over your normal protective gear while on the road. And this suit could work for all kinds of outdoor activities off the bike too, such as sporting events or for work.

The Thermosuit is just the ticket for those who want to ride in the winter. It’s perfect for commuters because the overall design allows you to “step into” the suit with your clothes on. The suit has a long front zipper (like a jacket) and also two long leg zippers which extend from the hip to the leg end. Just open up all three zippers and you can literally step into the suit even with boots on. All three zippers have generous storm flaps that close with Velcro to keep out the cold and/or rain.

The suit is insulated of course, and is also fitted with an internal waterproof liner. The thickness of the insulation is pretty good. It’s not super thick like a puffy jacket, but it seems like it would do a very good job especially considering you’ll have this over your regular clothing. The waterproof liner will keep out water, but it will also act as a wind block which adds to its ability to keep you warrm.

The suit has a couple pockets on the thighs, and one chest pocket outside and another chest pocket inside. As I mentioned in the sizing advice, the leg ends have elastic and will work over boots or just over your ankles (with shoes), and the sleeve ends are adjustable with Velcro. The collar is tall and also closes with Velcro. The inside of the collar is lined with comfy fleece.

I really like this suit for its purpose and I bet you’ll find all sorts of uses for it even off the bike. I think it’s a pretty neat product. :: Paul, 10-15-20

FirstGear says: Legendary classic, unbeatable value. 100% waterproof, it is the perfect kit on budget for those who want to ride all year