Giro Synthe Mips II Helmet in Matte Black Underground
Giro Synthe Mips II Helmet side
Giro Synthe Mips II Helmet back

+3

Synthe MIPS II Helmet
Synthe MIPS II Helmet
$111.07 $199.95

Color:
Size: Size Chart
Giro Size Charts

Bike Helments (unisex)

ADULT SUPER FIT SIZECIRCUMFERENCE (IN)CIRCUMFERENCE (CM)
S20" - 21.6"51 - 55
M21.6" - 23.2"55 - 59
L23.2" - 24.8"59 - 63
XL24" - 25.5"61 - 65

Universal Fit Women's Bike Helmets

UNIVERSAL FIT WOMENS SIZECIRCUMFERENCE (IN)CIRCUMFERENCE (CM)
UW19.6" - 22.4"50 - 57

Snow Helments (unisex)

ADULT SIZECIRCUMFERENCE (IN)CIRCUMFERENCE (CM)
S20.4" - 21.8"52 - 55.5
M21.8" - 23.2"55.5 - 59
L23.2" - 24.6"59 - 62.5
XL24.6" - 25.5"62.5 - 65

Men's Tops

SIZECHESTWAIST
XS33 - 35" / 83.8 - 88.9 cm27 - 29" / 68.6 - 73.7 cm
S35 - 37" / 88.9 - 94 cm29 - 31" / 73.7 - 78.7 cm
M38 - 40" / 96.5 - 101.6 cm31 - 33" / 78.7 - 83.8 cm
L41 - 43" / 104.1 - 109.2 cm33 - 35" / 83.8 - 88.9 cm
XL44 - 46" / 111.8 - 116.8 cm35 - 37" / 88.9 - 94 cm
XXL47 - 49" / 119.4 - 124.5 cm37 - 39" / 94 - 99.1 cm
XXXL50 - 52" / 127 - 132.1 cm39 - 41" / 99.1 - 104.1 cm

Men's Bottoms

SIZEHIPWAIST
28 (XS)33 - 35" / 83.8 - 88.9 cm27 - 29" / 68.6 - 73.7 cm
30 (S)35 - 37" / 88.9 - 94 cm29 - 31" / 73.7 - 78.7 cm
32 (M)38 - 40" / 96.5 - 101.6 cm31 - 33" / 78.7 - 83.8 cm
34 (L)40 - 42" / 101.6 - 106.7 cm33 - 35" / 83.8 - 88.9 cm
36 (XL)42 - 44" / 106.7 - 111.8 cm35 - 37" / 88.9 - 94 cm
38 (XXL)44 - 46" / 111.8 - 116.8 cm37 - 39" / 94 - 99.1 cm
40 (XXXL)46 - 48" / 116.8 - 121.9 cm39 - 41" / 99.1 - 104.1 cm

Men's Gloves

MEN'S SIZEHAND WIDTHHAND LENGTH
XS (6)6.3 - 7" / 160 - 178 mm5.9 - 6.5" / 150 - 164 mm
S (7)7" / 179 - 200 mm6.5 - 7" / 165 - 179 mm
M (8)8 - 8.6" / 201 - 219 mm7 - 7.6" / 180 - 194 mm
L (9)8.7 - 9" / 220 - 234 mm7.7 - 8" / 195 - 204 mm
XL (10)9.25 - 9.8" / 235 - 249 mm8 - 8.6" / 205 - 21 9mm
XXL (11)9.85 - 10" / 250 - 265 mm8.7 - 9.25" / 220 - 235 mm
XXXL (12)10.4 - 10.6" / 265 - 270 mm9.25 - 9.6" / 235 - 245 mm

Men's Socks

SOCK SIZEMEN'S US SHOEEU SHOE
S4 - 6.536 - 39
M7.5 - 940 - 42
L9.5 - 1143 - 45
XL12 - 13.546 - 48

Men's Shoes

EU SIZEUS MEN'S
36-
37-
37.5-
38-
38.5-
396.5
39.57
407.5
40.57.5
418
41.58.5
429.5
42.59.5
439.5
43.510
4410.5
44.511
4612
46.512.5
4713
4813.5
4914
5015

Women's Tops

SIZECHESTWAIST
XXS30 - 31" / 76.2 - 78.7 cm22 - 24" / 55.9 - 61 cm
XS32 - 33" / 81.3 - 83. cm24 - 26" / 61 - 66 cm
S34 - 35" / 86.4 - 88.9 cm26 - 28" / 66 - 71.1 cm
M36 - 37" / 91.4 - 94 cm28 - 30" / 71.1 - 76.2 cm
L38 - 39" / 96.5 - 99.1 cm30 - 32" / 76.2 - 81.3 cm
XL39 - 41" / 99.1 - 104.1 cm32 - 34" / 81.3 - 86.4 cm
XXL41 - 43" / 104.1 - 109.2 cm34 - 36" / 86.4 - 91. 4cm

Women's Bottoms

SIZEHIPWAIST
XS32 - 34" / 81.3 - 86.4 cm22 - 24" / 55.9 - 61 cm
S34 - 36" / 86.4 - 91.4 cm24 - 26" / 61 - 66 cm
M36 - 38" / 91.4 - 96.5 cm26 - 28" / 66 - 71.1 cm
L38 - 40" / 96.5 - 101.6 cm28 - 30" / 71.1 - 76.2 cm
XL40 - 42" / 101.6 - 106.7 cm30 - 32" / 76.2 - 81.3 cm
XXL42 - 44" / 106.7 - 111.8 cm32 - 34" / 81.3 - 86.4 cm
XXXL44 - 46" / 111.8 - 116.8 cm34 - 36" / 86.4 - 91.4 cm

Women's Gloves

WOMEN'S SIZEHAND WIDTHHAND LENGTH
S (6)6 - 6.7" / 155 - 169 mm6.3 - 6.7" / 160 - 169 mm
M (7)6.7 - 7.4" / 170 - 189 mm6.7 - 7.2" / 170 - 18 mm
L (8)7.4 - 8" / 190 - 204 mm7.3 - 7.7" / 185 - 195 mm
XL (9)8 - 8.3" / 205 - 210 mm7.7 - 8" / 196 - 205 mm

Women's Socks

SOCK SIZEMEN'S US SHOEEU SHOE
S4 - 6.536 - 39
M7.5 - 940 - 42
L9.5 - 1143 - 45
XL12 - 13.546 - 48

Women's Shoes

EU SIZEUS WOMEN'S
365
376
37.56.5
386.5
38.57
397.5
39.58
408.5
40.58.5
419
41.59.5
4210.5
42.510.5
4310.5

Youth Gloves

YOUTH SIZEHAND WIDTHHAND LENGTH
XS (3)5.2 - 5.6" / 133 - 142 mm5.9 - 6" / 150 - 154 mm
S (4)5.6 - 5.9" / 143 - 152 mm6 - 6.3" / 155 - 159 mm
M (5)6 - 6.4" / 153 - 162 mm6.3 - 6.5" / 160 - 165 mm
L (6)6.4 - 6.8" / 163 - 172 mm6.5 - 6.7" / 165 - 169 mm

Youth Bike Helmets

YOUTH SIZECIRCUMFERENCE (IN)CIRCUMFERENCE (CM)
XS (Scamp Model)17.7" - 19.2"45 - 49
S (Scamp Model)19.2" - 20.8"49 - 53
XS (Dime Model)18.5" - 20"47 - 51
S (Dime Model)20" - 21.6"51 - 55
Universal Child18.5" - 21.2"47 - 54
Universal Youth (Ages 5+)19.6" - 22.4"50 - 57

Youth Snow Helmets

YOUTH SIZECIRCUMFERENCE (IN)CIRCUMFERENCE (CM)
XS19" - 20.4"48.5 - 52
S20.4" - 21.8"52 - 55.5
M21.8" - 23.2"55.5 - 59
Quantity:
Available for pickup within 2 hours
Same-day pickup not available
Select Store Pickup in checkout
Ready in 3 days
Choose a store:
Sports Basement Berkeley
2727 Milvia St
Berkeley, CA 94703
Available
Same-day pickup not available
Sports Basement Campbell
1875 S Bascom Ave, Suite 240
The Pruneyard Shopping Center
Campbell, CA 95008
Available
Same-day pickup not available
Sports Basement Long Beach
2100 N Bellflower Blvd
Long Beach, CA 90815
Available
Same-day pickup not available
Sports Basement Novato
100 Vintage Way
Novato, CA 94945
Available
Same-day pickup not available
Sports Basement Orange County
10800 Kalama River Ave.
Fountain Valley, CA 92708
Available
Same-day pickup not available
Sports Basement Redwood City
202 Walnut Street
Redwood City, CA 94063
Available
Same-day pickup not available
Sports Basement SF Bryant St.
1590 Bryant Street
San Francisco, California 94103
Available
Same-day pickup not available
Sports Basement SF Presidio
610 Old Mason Street
San Francisco, CA 94129
Available
Same-day pickup not available
Sports Basement SF Stonestown
3251 20th Avenue
Suite 390
San Francisco, CA 94132
Available
Same-day pickup not available
Sports Basement San Ramon
1041 Market Place
San Ramon, CA 94583
Available
Same-day pickup not available
Sports Basement Santa Rosa
1970 Santa Rosa Avenue
Santa Rosa, CA 95407
Available
Same-day pickup not available
Sports Basement Sunnyvale
1177 Kern Ave
Sunnyvale, CA 94085
Available
Same-day pickup not available
Sports Basement Walnut Creek
1881 Ygnacio Valley Road
Walnut Creek, CA 94598
Available
Same-day pickup not available
Description

The Synthe Mips® II is an icon, updated to be lighter and more comfortable than ever before. The compact design slips through the air with ease, yet offers impressive cooling power in a light-yet-durable design that's been a rider favorite for years now. It's packed with Giro's best features, including the Roc Loc 5 Air Mips fit system with 2-way fit tuning and Integrated Mips (the Multi-directional Impact Protection System), the market-leading system designed to redirect rotational forces away from the brain and provide more protection in certain impacts.

  • Construction: In-Mold polycarbonate shell with EPS liner, Thermoformed SL Roll
  • Cage reinforcement
  • Ventilation: 19 Wind Tunnel vents with internal channeling
  • Fit System: Roc Loc® 5 Air Mips®
  • Product Weight: 275g (size Medium CPSC)|265g (size Medium CE)    
  • Complies with the US CPSC Safety Standard for Bicycle Helmet for Persons Age 5 and Older
  • E.U.: CE EN1078
  • Featherweight webbing with Slimline™ buckle
  • Ionic+™ anti-microbial padding
  • Best For
    Road and Gravel
  • Fit System
    Roc Loc® 5 Air Mips
  • Rotational Impact Protection
    MIPS
  • Weight
    273g (M)
Product Reviews