Login
VIPER 640 M-8 MAINSAIL
VIPER 640 M-8 MAINSAIL
VIPER 640 M-8 MAINSAIL
 Next

VIPER 640 M-8 MAINSAIL

Marsoni M251S
Sale price$1293.50
Pay 4 payments of $323.38 a month.Shop Pay
Get it in 3 business days with 1 day shipping. Friday, May 29
VIPER 640 M-8 MAINSAILThe M8 is an update to our tried and true M7 the winningest Mainsail in class history with Multiple World and Continental Championships. With a proven shape that delivers unparalleled top end speed and a forgiving twist profile, the M8 is built from our proprietary North XI laminate cloth. The forgiving nature of this sail makes it easy to get up to speed and stay there!
Easy Shipping

Quick Dispatch:

Your VIPER 640 M-8 MAINSAIL orders ship within 1-2 business days.

Delivery Options:

  • Standard: 3-7 business days
  • Fast: 2-3 business days
  • Express: 1-2 business days

Order Tracking:

You'll receive a tracking link by email once your VIPER 640 M-8 MAINSAIL ships.

Need Help?
Questions about VIPER 640 M-8 MAINSAIL, sizing, or delivery? We're just an email away.

Live Shipping Estimates:
Enter your location at checkout to see available shipping methods and costs for VIPER 640 M-8 MAINSAIL in your area.

Get Shipping Estimates

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 1421 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Sierra Schafer
Draper, US
★★★★★ 5
Very Comfortable
Size: 9, Color: Chestnut, Size: 9, Color: Chestnut
Good quality and very comfortable. Sizing is accurate.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
C
Verified Purchase
CrisJoy
New York, US
★★★★★ 4
Cute - change footbed please
Size: 8.5, Color: Dense Smoke
These are so comfy and fit my usually 8.5 foot great. It's the footbed of UGGs that I keep hoping they'll change. It's like our memory foam mattress - cushy and great UNTIL THE HEAT comes! Then it's a no for this hot 65 yo G'ma!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
M
Verified Purchase
maria cano
Fort Morgan, US
★★★★★ 3
No me quedaron
Size: 8, Color: Dense Smoke
No son del # vienen más pequeños
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
K
Verified Purchase
Kindle Customer
Battle Creek, US
★★★★★ 5
Super fun!
Size: 8.5, Color: Red Pepper
These are so fantastic! The color is amazing! It is a bit on the tomato-red side of the color-wheel. The fit is great. They are comfortable from the 1st step. Easy to walk in.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 17, 2026
A
Verified Purchase
Anapaula
Natrona Heights, US
★★★★★ 5
Love them
Size: 5.5, Color: Red Pepper
I have gotten so many compliments on these shoes! They’re true to size and comfortable. Because of the material feet might sweat easier if hot but they dry quick. Quality is great and the color looks good, it’s more of a orange/red color. I got a 5.5 size
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026

recommand products

Used: GT Palomar Bicycle
Used: GT Palomar Bicycle
150.00
 Butterfly Powerhouse 3.5″ Earrings-Gold
Butterfly Powerhouse 3.5″ Earrings-Gold
25.00
 Butterfly Stud Earring - Large
Butterfly Stud Earring - Large
60.00
 Pamoza Earrings
Pamoza Earrings
50.00
 Continuous Butterfly Hoop 4″ Earrings-White Gold
Continuous Butterfly Hoop 4″ Earrings-White Gold
54.00