HJC DS-X1 Synergy Dual Shield Adult Snow Helmets
The DS-X1 Synergy Snow helmet combines rugged functionality with winter-specific features. Perfect for snowy terrains, it provides reliable protection and clear visibility for all your winter riding adventures.
- Advanced Polycarbonate Compact Shell
- Superior Fit and Comfort Using Advanced CAD Technology
- SuperCool Moisture-Wicking Interior
- Large Eye Port for Maximum Visibility
- Pinlock-Prepared HJ-27 Shield
- Aerodynamic Visor and Shell
- Converts From Shield/Visor to Visor-Only Helmet
- “ACS” Advanced Channeling Ventilation System
- Choose between Dual or Electric Shield
- Standards: DOT-218
- Construction: Advanced Polycarbonate Composite Shell
- Weight: 3.5 lbs / 1573 grams based on size medium
- Colors: MC-3HSF, MC-47SF, MC-5SF
- Sizes: X-Small, Small, Medium, Large, X-Large, 2X-Large
- SKU: 1144-1433, 1144-1447, 1144-1435


















New or Brand New - Brand new item in original packaging (original manufacturer's warranty may apply).
Refurbished - Professionally restored and in perfect working condition. Original packaging may be missing or slightly damaged.
Used - Item has seen limited use but remains in good working condition. May show some limited signs of wear with small scratches or cosmetic blemishes. May arrive with damaged packaging or be repackaged.
Refurbished, Without Tags - Same as refurbished. Item may arrive with mising labels or tags.
Refurbished, Last Call - Same as refurbished. Last call or closeout item.
HOW TO DETERMINE YOUR HELMET SIZE
(H) HEAD
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.
SIZE | HEAD (CM) | HAT SIZE | HEAD (IN) |
---|---|---|---|
2XS | 51 - 52 | 6 3/8 - 6 1/2 | 20 1/8 - 20 1/2 |
XS | 53 - 54 | 6 5⁄8 - 6 3⁄4 | 20 7⁄8 - 21 1⁄4 |
SM | 55 - 56 | 6 7⁄8 - 7 | 21 5⁄8 - 22 |
MD | 57 - 58 | 7 1⁄8 - 7 1⁄4 | 22 1⁄2 - 22 7⁄8 |
LG | 59 - 60 | 7 3⁄8 - 7 1⁄2 | 23 1⁄4 - 23 5⁄8 |
XL | 61 - 62 | 7 5⁄8 - 7 3⁄4 | 24 - 24 3⁄8 |
2XL | 63 - 64 | 7 7⁄8 - 8 | 24 3⁄4 - 25 1⁄8 |
3XL | 65 - 66 | 8 1⁄8 - 8 1⁄4 | 25 5⁄8 - 26 |
4XL | 67 – 68 | 8 3⁄8 - 8 1⁄2 | 26 3⁄8 - 26 3/4 |
5XL | 69 – 70 | 8 3⁄4 - 8 3⁄4 | 27 1⁄4 - 27 5/8 |
SIZE | HEAD (CM) | HAT SIZE | HEAD (IN) |
---|---|---|---|
XS | 54 – 55 | 6 3/4 - 6 7/8 | 21 1/4 - 21 5/8 |
S | 55 – 56 | 6 7⁄8 - 7 | 21 5⁄8 - 22 |
M | 57 – 58 | 7 1⁄8 - 7 1/4 | 22 1⁄2 - 22 7/8 |
L | 58 – 59 | 7 1⁄4 - 7 3⁄8 | 22 7⁄8 - 23 1⁄4 |
XL | 60 – 61 | 7 1⁄2 - 7 5⁄8 | 23 5⁄8 - 24 |
2XL | 62 – 63 | 7 3⁄4 - 7 7⁄8 | 243⁄8 - 24 3/4 |
3XL | 64 – 65 | 8 - 8 1/8 | 25 1⁄4 - 25 5⁄8 |
SIZE | HEAD (CM) | HAT SIZE | HEAD (IN) |
---|---|---|---|
XS | 54 – 55 | 6 3/4 - 6 7/8 | 21 1/4 - 21 5/8 |
S | 56 – 57 | 7 - 71⁄8 | 22 - 221⁄2 |
M | 58 – 59 | 7 1⁄4 - 73/8 | 22 7⁄8 - 231/4 |
L | 60 – 61 | 7 1⁄2 - 7 5⁄8 | 235⁄8 - 24 |
XL | 62 – 63 | 73⁄4 - 247⁄8 | 233⁄8 - 243/4 |
2XL | 63 – 64 | 8 - 81⁄8 | 251⁄4 - 255/8 |
3XL | 65 – 66 | 81/8 - 81/4 | 255⁄8 - 26 |
4XL | 67 – 68 | 83/8 - 81/2 | 263⁄8 - 263/4 |
5XL | 69 – 70 | 83/4 - 83/4 | 271⁄4 - 275/8 |
HOW TO DETERMINE YOUR HELMET SIZE
(H) HEAD
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, repeat for good measure and use the largest measurement.
SIZE | HEAD (CM) | HAT SIZE | HEAD (IN) |
---|---|---|---|
YOUTH S | 49 – 50 | 61/8 - 61/4 | 191/4 - 193/4 |
YOUTH M | 51 – 52 | 63⁄8 - 61⁄2 | 20 - 201⁄2 |
YOUTH L | 53 – 54 | 65⁄8 - 63/4 | 207⁄8 - 211/4 |
YOUTH S/M | 49 – 50 | 61⁄8 - 61⁄4 | 191⁄4 - 193⁄4 |
YOUTH L/XL | 63/8 - 61/2 | 63⁄8 - 61⁄2 | 20 - 201⁄2 |