MS VIPERS features
wider shorter blade for quick acceleration
beveled sidewalls increase control
delta tail design to minimize drag and increase control
maximum foot pocket drainage eliminates any sand or pebbles in your kick
rivet tread enhances foot on slippery rocks yet wont snag on coral or sharp objects
all VIPER swim fins are design with the superior 100% natural rubber compound
all VIPER swim fins are visible and float 
Black with Yellow Dot MS Vipers are made with a stiff rubber compound
All other colors are made with a softer rubber compound
Size Chart:
XS (m 3-4 / w 4.5-5)
S (m 4-6 / w 6-7.5)
M (m 7-8 / w 8-9.5)
ML (m 8-10 / w 10-11.5)
L (m 10-11 / w 11-12.5)
XL (m 11-13 / w 13-14.5)
XXL (m 14-15 / w 15-16)