Sparco RW-4 Fire Resistant Racing Undershirt - FIA 8856-2018

Name: Sparco RW-4 Fire Resistant Racing Undershirt - FIA 8856-2018
Brand: Sparco
Price: 159.0 USD
Availability: InStock
Rating: 4.75 (4 reviews)

$159.00 USD

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Size Small Medium Large X-Large XX-Large 3X-Large

Color White

In stock

Sparco RW-4 Fire Resistant Racing Undershirt — FIA 8856-2018. a base layer engineered to vanish under the suit.

Sparco's entry-level RW-4 line of underwear is optimized for both comfort and protection while maintaining a budget price. Using Sparco's classic soft-touch fire resistant fabric, the regular fit undershirt is comfortable for all body types.

WHAT YOU GET

Sparco's entry-level RW-4 line of underwear is optimized for both comfort and protection while maintaining a budget price.
Using Sparco's classic soft-touch fire resistant fabric, the regular fit undershirt is comfortable for all body types.

CERT
FIA 8856-2018

FAQ

Is this worn alone or layered under a suit?
It's a base layer worn underneath your racing suit, not standalone apparel.

What's it made from?
See the construction details above — the original listing doesn't specify exact fabric percentages.

FASTLAP SUPPLY TAKE: Legit FIA-rated gear — if you're racing wheel-to-wheel, this is the layer that actually has to be there.

FastLap Supply Fit Check:

🇮🇹 Italian Brand — Euro Sizing Runs Small

Sparco lifestyle apparel is designed and sized in Italy. Italian sizing runs smaller than US sizing. US customers: when in doubt, we recommend sizing up one size for your best fit.

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Size	Head Circumference (cm)
2XS	54-55
XS	55-56
S	57-58
M	58-59
L	60-61
XL	61-62
2XL	63-64
3XL	65-66
4XL	67-68

Size	Chest (cm)	Waist (cm)	Height (cm)
XS	86-91	71-76	165-170
S	91-97	76-81	170-175
M	97-102	81-86	175-180
L	102-107	86-91	180-185
XL	107-112	91-97	185-190
2XL	112-117	97-102	190-195
3XL	117-122	102-107	195-200

Size	Hand Circumference (cm)
XS	17-18
S	19-20
M	21-22
L	23-24
XL	25-26
2XL	27-28

EU	US Mens	US Womens	Foot Length (cm)
38	5.5	7	24.1
39	6.5	8	24.8
40	7	8.5	25.4
41	8	9.5	26.0
42	8.5	10	26.7
43	9.5	11	27.3
44	10	11.5	27.9
45	11	12.5	28.6
46	12	13.5	29.2
47	13	14.5	29.8

Size	Chest (cm)	Length (cm)
XS	86-91	68
S	91-97	70
M	97-102	72
L	102-107	74
XL	107-112	76
2XL	112-117	78
3XL	117-122	80

Some FastLap Supply tees run oversized and boxy — size down for a fitted look.

Size	Chest (cm)
XS	86-91
S	91-97
M	97-102
L	102-107
XL	107-112
2XL	112-117
3XL	117-122

Sparco and European brand jackets run slim and euro-cut — size up if between sizes or you prefer a relaxed fit.

EU	US Mens	US Womens
38	5.5	7
39	6.5	8
40	7	8.5
41	8	9.5
42	8.5	10
43	9.5	11
44	10	11.5
45	11	12.5
46	12	13.5
47	13	14.5

5 stars: 3 (75%)
4 stars: 1 (25%)
3 stars: 0 (0%)
2 stars: 0 (0%)
1 star: 0 (0%)

Worth it

wear this under my suit every autocross season weekend. breathes surprisingly well for a fire-rated layer, doesn't turn into a sauna under the suit. pricier than a cotton base layer but that's the FIA rating talking. good base layer, would buy again.

Great for club racing

Wear this under my suit every lemons weekend. noticeably cooler than the cotton undershirt I used to wear, worth the upgrade. does what a fire-rated layer should, disappears once you're strapped in.

Race day proven

picked this up as a base layer for hpde days. breathes surprisingly well for a fire-rated layer, doesn't turn into a sauna under the suit. runs a little small, sized up and it fit better. does what a fire-rated layer should, disappears once you're strapped in.

No complaints

Switched to this after my cotton undershirt started feeling sketchy under the suit. breathes surprisingly well for a fire-rated layer, doesn't turn into a sauna under the suit. runs a little small, sized up and it fit better. does what a fire-rated layer should, disappears once you're strapped in.